[NANOG] Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri May 2 18:06:35 UTC 2008


This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.
Daily listings are sent to bgp-stats at lists.apnic.net

For historical data, please see http://thyme.apnic.net.

If you have any comments please contact Philip Smith <pfs at cisco.com>.

Routing Table Report   04:00 +10GMT Sat 03 May, 2008

Report Website:     http://thyme.apnic.net
Detailed Analysis:  http://thyme.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined:                              254787
    Prefixes after maximum aggregation:                          127004
    Deaggregation factor:                                          2.01
    Unique aggregates announced to Internet:                     123511
Total ASes present in the Internet Routing Table:                 28069
    Prefixes per ASN:                                              9.08
Origin-only ASes present in the Internet Routing Table:           24458
Origin ASes announcing only one prefix:                           11398
Transit ASes present in the Internet Routing Table:                3611
Transit-only ASes present in the Internet Routing Table:             82
Average AS path length visible in the Internet Routing Table:       3.6
    Max AS path length visible:                                      19
    Max AS path prepend of ASN (44859)                               15
Prefixes from unregistered ASNs in the Routing Table:             25380
    Unregistered ASNs in the Routing Table:                        1890
Number of 32-bit ASNs allocated by the RIRs:                         46
Prefixes from 32-bit ASNs in the Routing Table:                      10
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            790
Number of addresses announced to Internet:                   1865259040
    Equivalent to 111 /8s, 45 /16s and 152 /24s
    Percentage of available address space announced:               50.3
    Percentage of allocated address space announced:               61.8
    Percentage of available address space allocated:               81.4
    Percentage of address space in use by end-sites:               71.7
Total number of prefixes smaller than registry allocations:      122514

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                    43073
    Total APNIC prefixes after maximum aggregation:               13461
    APNIC Deaggregation factor:                                    3.20
Prefixes being announced from the APNIC address blocks:           55456
    Unique aggregates announced from the APNIC address blocks:    23561
APNIC Region origin ASes present in the Internet Routing Table:    1934
    APNIC Prefixes per ASN:                                       28.67
APNIC Region origin ASes announcing only one prefix:                553
APNIC Region transit ASes present in the Internet Routing Table:    350
Average APNIC Region AS path length visible:                        3.6
    Max APNIC Region AS path length visible:                         14
Number of APNIC addresses announced to Internet:              346760800
    Equivalent to 20 /8s, 171 /16s and 38 /24s
    Percentage of available APNIC address space announced:         79.5

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079
APNIC Address Blocks    58/8,  59/8,  60/8,  61/8, 114/8, 115/8, 116/8,
                       117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8,
                       124/8, 125/8, 126/8, 202/8, 203/8, 210/8, 211/8,
                       218/8, 219/8, 220/8, 221/8, 222/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                    107789
    Total ARIN prefixes after maximum aggregation:                59234
    ARIN Deaggregation factor:                                     1.82
Prefixes being announced from the ARIN address blocks:            86721
    Unique aggregates announced from the ARIN address blocks:     34340
ARIN Region origin ASes present in the Internet Routing Table:    11784
    ARIN Prefixes per ASN:                                         7.36
ARIN Region origin ASes announcing only one prefix:                4611
ARIN Region transit ASes present in the Internet Routing Table:    1044
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          16
Number of ARIN addresses announced to Internet:               358349568
    Equivalent to 21 /8s, 91 /16s and 251 /24s
    Percentage of available ARIN address space announced:          73.7

ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
ARIN Address Blocks     24/8,  63/8,  64/8,  65/8,  66/8,  67/8,  68/8,
                        69/8,  70/8,  71/8,  72/8,  73/8,  74/8,  75/8,
                        76/8,  96/8,  97/8,  98/8,  99/8, 173/8, 174/8,
                       199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8,
                       216/8,

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                     54894
    Total RIPE prefixes after maximum aggregation:                33555
    RIPE Deaggregation factor:                                     1.64
Prefixes being announced from the RIPE address blocks:            50101
    Unique aggregates announced from the RIPE address blocks:     33548
RIPE Region origin ASes present in the Internet Routing Table:    11253
    RIPE Prefixes per ASN:                                         4.45
RIPE Region origin ASes announcing only one prefix:                5880
RIPE Region transit ASes present in the Internet Routing Table:    1720
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          18
Number of RIPE addresses announced to Internet:               355464448
    Equivalent to 21 /8s, 47 /16s and 245 /24s
    Percentage of available RIPE address space announced:          81.5

RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104 - 48127
RIPE Address Blocks     62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 193/8,
                       194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                   19830
    Total LACNIC prefixes after maximum aggregation:               4971
    LACNIC Deaggregation factor:                                   3.99
Prefixes being announced from the LACNIC address blocks:          18261
    Unique aggregates announced from the LACNIC address blocks:    9839
LACNIC Region origin ASes present in the Internet Routing Table:    893
    LACNIC Prefixes per ASN:                                      20.45
LACNIC Region origin ASes announcing only one prefix:               277
LACNIC Region transit ASes present in the Internet Routing Table:   154
Average LACNIC Region AS path length visible:                       4.1
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              50827264
    Equivalent to 3 /8s, 7 /16s and 144 /24s
    Percentage of available LACNIC address space announced:        50.5

LACNIC AS Blocks       26592-26623, 27648-28671, plus ERX transfers
LACNIC Address Blocks  186/8, 187/8, 189/8, 190/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   3820
    Total AfriNIC prefixes after maximum aggregation:              1216
    AfriNIC Deaggregation factor:                                  3.14
Prefixes being announced from the AfriNIC address blocks:          4152
    Unique aggregates announced from the AfriNIC address blocks:   1842
AfriNIC Region origin ASes present in the Internet Routing Table:   241
    AfriNIC Prefixes per ASN:                                     17.23
AfriNIC Region origin ASes announcing only one prefix:               77
AfriNIC Region transit ASes present in the Internet Routing Table:   48
Average AfriNIC Region AS path length visible:                      4.0
    Max AfriNIC Region AS path length visible:                       14
Number of AfriNIC addresses announced to Internet:             11770624
    Equivalent to 0 /8s, 179 /16s and 155 /24s
    Percentage of available AfriNIC address space announced:       35.1

AfriNIC AS Blocks      36864-37887 & ERX transfers
AfriNIC Address Blocks  41/8, 196/8,

APNIC Region per AS prefix count summary
----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4755     1640        387          90   Videsh Sanchar Nigam Ltd. Aut
 9583     1174        140          16   Sify Limited
 9498     1165        550          61   BHARTI BT INTERNET LTD.
17488     1060         70          75   Hathway IP Over Cable Interne
 4134      855      12615         319   CHINANET-BACKBONE
 4766      850       6006         345   Korea Telecom (KIX)
18101      680        149          54   Reliance Infocom Ltd Internet
 9829      598        450          12   BSNL National Internet Backbo
 1221      544       1918         418   Telstra Pty Ltd
 4808      515        829         129   CNCGROUP IP network: China169

Complete listing at http://thyme.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4323     1425       1014         376   Time Warner Telecom
 7018     1403       5977        1000   AT&T WorldNet Services
 2386     1396        642         862   AT&T Data Communications Serv
11492     1211        146          36   Cable One 
 7011     1098        319         626   Citizens Utilities 
18566     1043        296          10   Covad Communications 
 1785     1014        511         106   AppliedTheory Corporation 
 6197      987        598         508   BellSouth Network Solutions, 
  174      971       6835         802   Cogent Communications
22773      948       2394          62   Cox Communications, Inc.

Complete listing at http://thyme.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 3292      407       1788         367   TDC Tele Danmark
 9198      401         74           9   Kazakhtelecom Data Network Ad
 8452      356        188           7   TEDATA
 3301      338       1458         306   TeliaNet Sweden
 3320      324       7044         267   Deutsche Telekom AG
 8866      298         78          24   Bulgarian Telecommunication C
 5462      292        666          26   Telewest Broadband
 8551      282        269          37   Bezeq International
 3215      277       2678          89   France Telecom Transpac
  680      272       2047         262   DFN-IP service G-WiN

Complete listing at http://thyme.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8151     1201       2432         223   UniNet S.A. de C.V. 
11830      601        299           9   Instituto Costarricense de El
22047      564        270          14   VTR PUNTO NET S.A. 
 7303      455        222          60   Telecom Argentina Stet-France
16814      426         27          10   NSS, S.A. 
 6471      416         85          46   ENTEL CHILE S.A. 
11172      415        117          69   Servicios Alestra S.A de C.V 
10620      388         99          76   TVCABLE BOGOTA 
14117      384         25          15   Telefonica del Sur S.A. 
20299      341         36          31   NEWCOM AMERICAS 

Complete listing at http://thyme.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
24863      464         61          27   LINKdotNET AS number
 3741      289        853         223   The Internet Solution 
20858      218         34           3   EgyNet
 2018      179        190          86   Tertiary Education Network 
 5713      150        558         120   Telkom SA Ltd 
 6713      143        135          11   Itissalat Al-MAGHRIB
33783      134         10          12   EEPAD TISP TELECOM & INTERNET
 5536      121          8          16   Internet Egypt Network
29571      116         13           8   Ci Telecom Autonomous system 
33776       99          6           7   Starcomms Nigeria Limited

Complete listing at http://thyme.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 6389     2900       3021         117   bellsouth.net, inc. 
23577     1642         34         701   Korea Telecom (ATM-MPLS)
 4755     1640        387          90   Videsh Sanchar Nigam Ltd. Aut
 4323     1425       1014         376   Time Warner Telecom
 7018     1403       5977        1000   AT&T WorldNet Services
 2386     1396        642         862   AT&T Data Communications Serv
11492     1211        146          36   Cable One 
 8151     1201       2432         223   UniNet S.A. de C.V. 
 9583     1174        140          16   Sify Limited
 9498     1165        550          61   BHARTI BT INTERNET LTD.

Complete listing at http://thyme.apnic.net/current/data-ASnet

Global Per AS Maximum Aggr summary
----------------------------------

  ASN   No of nets  Net Savings Description
 4755      1640        1550      Videsh Sanchar Nigam Ltd. Aut
11492      1211        1175      Cable One 
 9583      1174        1158      Sify Limited
 9498      1165        1104      BHARTI BT INTERNET LTD.
 4323      1425        1049      Time Warner Telecom
18566      1043        1033      Covad Communications 
17488      1060         985      Hathway IP Over Cable Interne
 8151      1201         978      UniNet S.A. de C.V. 
17676      1016         951      Softbank BB Corp.
23577      1642         941      Korea Telecom (ATM-MPLS)

Complete listing at http://thyme.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS  Designation  Network              Transit AS  Description
14780   UNALLOCATED   4.79.181.0/24        10310       Yahoo! 
12180   UNALLOCATED   4.79.248.0/24         1239       Sprint 
12180   UNALLOCATED   8.10.16.0/24          3549       Global Crossing 
12180   UNALLOCATED   8.10.58.0/23          3549       Global Crossing 
14779   UNALLOCATED   8.12.144.0/24        10310       Yahoo! 
16927   UNALLOCATED   12.0.252.0/23          701       UUNET Technologies, 
22492   UNALLOCATED   12.2.46.0/24          1239       Sprint 
15132   UNALLOCATED   12.9.150.0/24          701       UUNET Technologies, 
32567   UNALLOCATED   12.14.170.0/24        7018       AT&T WorldNet Servic
13632   UNALLOCATED   12.20.55.0/24         6517       Yipes Communications

Complete listing at http://thyme.apnic.net/current/data-badAS

Advertised Unallocated Addresses
--------------------------------

Network            Origin AS  Description
24.51.159.0/24        7843     Adelphia Corp. 
24.54.224.0/19       20001     HoldCo LLC - Road Runner 
24.75.160.0/19        7843     Adelphia Corp. 
24.75.192.0/18        7843     Adelphia Corp. 
24.142.40.0/21        7018     AT&T WorldNet Services
24.142.160.0/19       7018     AT&T WorldNet Services
24.246.0.0/17         7018     AT&T WorldNet Services
24.246.128.0/18       7018     AT&T WorldNet Services
62.61.220.0/24       24974     Tachyon Europe BV - Wireless 
63.140.213.0/24      22555     Universal Talkware Corporatio

Complete listing at http://thyme.apnic.net/current/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:19       /9:9       /10:16      /11:42      /12:139     
/13:280     /14:506     /15:1002    /16:9886    /17:4361    /18:7292    
/19:15380   /20:17794   /21:17202   /22:21610   /23:22706   /24:134198  
/25:783     /26:939     /27:497     /28:108     /29:9       /30:1       
/31:0       /32:8       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

  ASN   No of nets  Total ann.   Description
11492     1197          1211      Cable One 
 2386     1096          1396      AT&T Data Communications Serv
18566     1024          1043      Covad Communications 
 9583     1009          1174      Sify Limited
 7011      981          1098      Citizens Utilities 
 4755      975          1640      Videsh Sanchar Nigam Ltd. Aut
 6478      934           935      AT&T Worldnet Services 
 6389      899          2900      bellsouth.net, inc. 
17488      872          1060      Hathway IP Over Cable Interne
 9498      841          1165      BHARTI BT INTERNET LTD.

Complete listing at http://thyme.apnic.net/current/data/sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   4:9         8:106      12:2027     13:1        15:20       16:3      
  17:5        18:13       20:35       24:1072     25:1        32:61     
  33:4        38:419      40:94       41:662      44:2        47:8      
  52:3        55:3        56:3        57:22       58:513      59:460    
  60:441      61:984      62:1109     63:1962     64:3411     65:2434   
  66:3629     67:1170     68:674      69:2192     70:599      71:126    
  72:1675     73:6        74:950      75:228      76:303      77:648    
  78:605      79:149      80:898      81:856      82:624      83:372    
  84:545      85:993      86:399      87:655      88:345      89:1278   
  90:11       91:1213     92:293      93:360      96:25       97:14     
  98:151      99:3       116:634     117:297     118:124     119:374    
 120:14      121:525     122:756     123:320     124:853     125:1120   
 128:292     129:198     130:129     131:405     132:67      133:9      
 134:179     135:32      136:223     137:112     138:150     139:62     
 140:485     141:96      142:395     143:285     144:357     145:50     
 146:358     147:150     148:506     149:183     150:131     151:181    
 152:141     153:133     154:10      155:269     156:207     157:267    
 158:168     159:221     160:253     161:111     162:208     163:194    
 164:582     165:448     166:304     167:320     168:614     169:128    
 170:422     171:28      172:2       189:164     190:1822    192:5773   
 193:4097    194:3255    195:2417    196:1057    198:3743    199:3227   
 200:5651    201:1447    202:7542    203:7829    204:3998    205:2090   
 206:2394    207:2749    208:3295    209:3444    210:2539    211:1044   
 212:1369    213:1634    214:445     215:51      216:4337    217:1218   
 218:347     219:406     220:1069    221:482     222:305    

End of report




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