[Nanog] Weekly Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Apr 18 13:06:54 CDT 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 19 Apr, 2008

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

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

BGP routing table entries examined:                              253162
    Prefixes after maximum aggregation:                          126760
    Deaggregation factor:                                          2.00
    Unique aggregates announced to Internet:                     123363
Total ASes present in the Internet Routing Table:                 27936
    Prefixes per ASN:                                              9.06
Origin-only ASes present in the Internet Routing Table:           24339
Origin ASes announcing only one prefix:                           11339
Transit ASes present in the Internet Routing Table:                3597
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 (39375)                               13
Prefixes from unregistered ASNs in the Routing Table:             25206
    Unregistered ASNs in the Routing Table:                        1878
Number of 32-bit ASNs allocated by the RIRs:                         44
Prefixes from 32-bit ASNs in the Routing Table:                       9
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:            817
Number of addresses announced to Internet:                   1863527072
    Equivalent to 111 /8s, 19 /16s and 42 /24s
    Percentage of available address space announced:               50.3
    Percentage of allocated address space announced:               61.7
    Percentage of available address space allocated:               81.4
    Percentage of address space in use by end-sites:               71.6
Total number of prefixes smaller than registry allocations:      121228

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

Prefixes being announced by APNIC Region ASes:                    42770
    Total APNIC prefixes after maximum aggregation:               13580
    APNIC Deaggregation factor:                                    3.15
Prefixes being announced from the APNIC address blocks:           55042
    Unique aggregates announced from the APNIC address blocks:    23982
APNIC Region origin ASes present in the Internet Routing Table:    1919
    APNIC Prefixes per ASN:                                       28.68
APNIC Region origin ASes announcing only one prefix:                552
APNIC Region transit ASes present in the Internet Routing Table:    351
Average APNIC Region AS path length visible:                        3.6
    Max APNIC Region AS path length visible:                         14
Number of APNIC addresses announced to Internet:              343577696
    Equivalent to 20 /8s, 122 /16s and 148 /24s
    Percentage of available APNIC address space announced:         78.8

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:                    107494
    Total ARIN prefixes after maximum aggregation:                59206
    ARIN Deaggregation factor:                                     1.82
Prefixes being announced from the ARIN address blocks:            86580
    Unique aggregates announced from the ARIN address blocks:     34280
ARIN Region origin ASes present in the Internet Routing Table:    11728
    ARIN Prefixes per ASN:                                         7.38
ARIN Region origin ASes announcing only one prefix:                4573
ARIN Region transit ASes present in the Internet Routing Table:    1051
Average ARIN Region AS path length visible:                         3.4
    Max ARIN Region AS path length visible:                          16
Number of ARIN addresses announced to Internet:               362513664
    Equivalent to 21 /8s, 155 /16s and 133 /24s
    Percentage of available ARIN address space announced:          74.5

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
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:                     54327
    Total RIPE prefixes after maximum aggregation:                33347
    RIPE Deaggregation factor:                                     1.63
Prefixes being announced from the RIPE address blocks:            49539
    Unique aggregates announced from the RIPE address blocks:     33168
RIPE Region origin ASes present in the Internet Routing Table:    11204
    RIPE Prefixes per ASN:                                         4.42
RIPE Region origin ASes announcing only one prefix:                5857
RIPE Region transit ASes present in the Internet Routing Table:    1705
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          18
Number of RIPE addresses announced to Internet:               353545728
    Equivalent to 21 /8s, 18 /16s and 174 /24s
    Percentage of available RIPE address space announced:          81.0

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
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:                   19668
    Total LACNIC prefixes after maximum aggregation:               4920
    LACNIC Deaggregation factor:                                   4.00
Prefixes being announced from the LACNIC address blocks:          18046
    Unique aggregates announced from the LACNIC address blocks:    9732
LACNIC Region origin ASes present in the Internet Routing Table:    893
    LACNIC Prefixes per ASN:                                      20.21
LACNIC Region origin ASes announcing only one prefix:               279
LACNIC Region transit ASes present in the Internet Routing Table:   153
Average LACNIC Region AS path length visible:                       4.0
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              50580736
    Equivalent to 3 /8s, 3 /16s and 205 /24s
    Percentage of available LACNIC address space announced:        50.2

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:                   3696
    Total AfriNIC prefixes after maximum aggregation:              1150
    AfriNIC Deaggregation factor:                                  3.21
Prefixes being announced from the AfriNIC address blocks:          4073
    Unique aggregates announced from the AfriNIC address blocks:   1828
AfriNIC Region origin ASes present in the Internet Routing Table:   235
    AfriNIC Prefixes per ASN:                                     17.33
AfriNIC Region origin ASes announcing only one prefix:               78
AfriNIC Region transit ASes present in the Internet Routing Table:   43
Average AfriNIC Region AS path length visible:                      3.8
    Max AfriNIC Region AS path length visible:                       15
Number of AfriNIC addresses announced to Internet:             11336192
    Equivalent to 0 /8s, 172 /16s and 250 /24s
    Percentage of available AfriNIC address space announced:       33.8

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     1632        387          89   Videsh Sanchar Nigam Ltd. Aut
 9583     1166         99         211   Sify Limited
 9498     1162        550          61   BHARTI BT INTERNET LTD.
17488     1016         69          78   Hathway IP Over Cable Interne
 4134      856      12647         320   CHINANET-BACKBONE
 4766      851       6006         344   Korea Telecom (KIX)
18101      681        132          54   Reliance Infocom Ltd Internet
 9829      598        450          12   BSNL National Internet Backbo
 1221      544       1918         418   Telstra Pty Ltd
 4812      544        980          73   China Telecom (Shanghai)

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     1428       1030         377   Time Warner Telecom
 7018     1407       5978        1006   AT&T WorldNet Services
 2386     1394        642         862   AT&T Data Communications Serv
11492     1214        146          45   Cable One 
 7011     1094        318         621   Citizens Utilities 
18566     1043        296          10   Covad Communications 
 1785     1011        511         107   AppliedTheory Corporation 
 6197      984        597         507   BellSouth Network Solutions, 
  174      967       6835         801   Cogent Communications
20115      922        874         512   Charter Communications 

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      406       1787         368   TDC Tele Danmark
 8452      356        188           7   TEDATA
 9198      339         74           9   Kazakhtelecom Data Network Ad
 3301      338       1459         307   TeliaNet Sweden
 3320      327       7045         271   Deutsche Telekom AG
 8866      293         78          24   Bulgarian Telecommunication C
 8551      282        269          37   Bezeq International
 3215      279       2679          89   France Telecom Transpac
 5462      275        666          26   Telewest Broadband
 6746      267        128         244   Dynamic Network Technologies,

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     1190       2433         221   UniNet S.A. de C.V. 
11830      571        299           9   Instituto Costarricense de El
22047      558        270          14   VTR PUNTO NET S.A. 
 7303      448        220          59   Telecom Argentina Stet-France
16814      426         27          10   NSS, S.A. 
11172      415        117          70   Servicios Alestra S.A de C.V 
 6471      413         85          46   ENTEL CHILE S.A. 
10620      403        105          52   TVCABLE BOGOTA 
14117      384         25          15   Telefonica del Sur S.A. 
20299      300         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      463         61          27   LINKdotNET AS number
 3741      289        853         223   The Internet Solution 
20858      217         34           3   EgyNet
 2018      187        222          91   Tertiary Education Network 
 6713      143        135          11   Itissalat Al-MAGHRIB
33783      134         10          13   EEPAD TISP TELECOM & INTERNET
 5536      121          8          16   Internet Egypt Network
29571      119         13           8   Ci Telecom Autonomous system 
 5713      105        507          83   Telkom SA Ltd 
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     2838       3020         115   bellsouth.net, inc. 
23577     1640         34         701   Korea Telecom (ATM-MPLS)
 4755     1632        387          89   Videsh Sanchar Nigam Ltd. Aut
 4323     1428       1030         377   Time Warner Telecom
 7018     1407       5978        1006   AT&T WorldNet Services
 2386     1394        642         862   AT&T Data Communications Serv
11492     1214        146          45   Cable One 
 8151     1190       2433         221   UniNet S.A. de C.V. 
 9583     1166         99         211   Sify Limited
 9498     1162        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      1632        1543      Videsh Sanchar Nigam Ltd. Aut
11492      1214        1169      Cable One 
 9498      1162        1101      BHARTI BT INTERNET LTD.
 4323      1428        1051      Time Warner Telecom
18566      1043        1033      Covad Communications 
 8151      1190         969      UniNet S.A. de C.V. 
 9583      1166         955      Sify Limited
17676      1016         951      Softbank BB Corp.
23577      1640         939      Korea Telecom (ATM-MPLS)
17488      1016         938      Hathway IP Over Cable Interne

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         7018       AT&T WorldNet Servic
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      /12:138     
/13:279     /14:507     /15:1008    /16:9837    /17:4360    /18:7294    
/19:15314   /20:17741   /21:16990   /22:21579   /23:22563   /24:133179  
/25:766     /26:908     /27:494     /28:101     /29:9       /30:1       
/31:0       /32:8       

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

  ASN   No of nets  Total ann.   Description
11492     1200          1214      Cable One 
 2386     1092          1394      AT&T Data Communications Serv
18566     1024          1043      Covad Communications 
 9583     1004          1166      Sify Limited
 7011      977          1094      Citizens Utilities 
 4755      970          1632      Videsh Sanchar Nigam Ltd. Aut
 6478      910           911      AT&T Worldnet Services 
 6389      882          2838      bellsouth.net, inc. 
 9498      836          1162      BHARTI BT INTERNET LTD.
17488      828          1016      Hathway IP Over Cable Interne

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

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

   4:9         8:105      12:2004     13:1        15:20       16:3      
  17:6        18:13       20:35       24:1061     25:1        32:61     
  33:4        38:415      40:94       41:633      44:2        47:8      
  52:3        55:3        56:3        57:22       58:517      59:452    
  60:410      61:980      62:1080     63:1958     64:3460     65:2395   
  66:3633     67:1154     68:672      69:2145     70:608      71:125    
  72:1688     73:6        74:942      75:225      76:291      77:628    
  78:578      79:146      80:889      81:851      82:590      83:364    
  84:561      85:1002     86:383      87:643      88:323      89:1259   
  90:11       91:1192     92:274      93:251      96:23       97:14     
  98:138      99:3       116:603     117:285     118:113     119:388    
 120:13      121:517     122:745     123:314     124:838     125:1111   
 128:318     129:199     130:126     131:397     132:65      133:9      
 134:180     135:32      136:220     137:111     138:147     139:61     
 140:489     141:96      142:430     143:279     144:346     145:50     
 146:346     147:142     148:501     149:181     150:128     151:176    
 152:142     153:121     154:10      155:265     156:175     157:264    
 158:168     159:221     160:253     161:110     162:209     163:196    
 164:510     165:445     166:299     167:316     168:606     169:127    
 170:427     171:28      172:2       189:162     190:1779    192:5769   
 193:4090    194:3251    195:2393    196:1037    198:3741    199:3236   
 200:5613    201:1401    202:7566    203:7808    204:3996    205:2124   
 206:2395    207:2744    208:3261    209:3472    210:2542    211:1043   
 212:1344    213:1649    214:449     215:48      216:4281    217:1218   
 218:353     219:407     220:1080    221:396     222:311    

End of report




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