Weekly Routing Table Report
Routing Analysis Role Account
cscora at apnic.net
Fri Mar 25 18:38:39 UTC 2011
This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.
The posting is sent to APOPS, NANOG, AfNOG, AusNOG, SANOG, PacNOG, LacNOG,
CaribNOG and the RIPE Routing Working Group.
Daily listings are sent to bgp-stats at lists.apnic.net
For historical data, please see http://thyme.rand.apnic.net.
If you have any comments please contact Philip Smith <pfs at cisco.com>.
Routing Table Report 04:00 +10GMT Sat 26 Mar, 2011
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
----------------
BGP routing table entries examined: 351425
Prefixes after maximum aggregation: 159549
Deaggregation factor: 2.20
Unique aggregates announced to Internet: 173538
Total ASes present in the Internet Routing Table: 37074
Prefixes per ASN: 9.48
Origin-only ASes present in the Internet Routing Table: 31157
Origin ASes announcing only one prefix: 14986
Transit ASes present in the Internet Routing Table: 4992
Transit-only ASes present in the Internet Routing Table: 129
Average AS path length visible in the Internet Routing Table: 4.3
Max AS path length visible: 31
Max AS path prepend of ASN (36992) 29
Prefixes from unregistered ASNs in the Routing Table: 451
Unregistered ASNs in the Routing Table: 217
Number of 32-bit ASNs allocated by the RIRs: 1230
Number of 32-bit ASNs visible in the Routing Table: 925
Prefixes from 32-bit ASNs in the Routing Table: 2001
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 191
Number of addresses announced to Internet: 2390772288
Equivalent to 142 /8s, 128 /16s and 74 /24s
Percentage of available address space announced: 64.5
Percentage of allocated address space announced: 64.5
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 89.6
Total number of prefixes smaller than registry allocations: 145378
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 87775
Total APNIC prefixes after maximum aggregation: 29913
APNIC Deaggregation factor: 2.93
Prefixes being announced from the APNIC address blocks: 84659
Unique aggregates announced from the APNIC address blocks: 36676
APNIC Region origin ASes present in the Internet Routing Table: 4370
APNIC Prefixes per ASN: 19.37
APNIC Region origin ASes announcing only one prefix: 1214
APNIC Region transit ASes present in the Internet Routing Table: 692
Average APNIC Region AS path length visible: 4.4
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 45
Number of APNIC addresses announced to Internet: 600588608
Equivalent to 35 /8s, 204 /16s and 65 /24s
Percentage of available APNIC address space announced: 76.2
APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079
55296-56319, 131072-132095
APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8,
49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8,
106/8, 110/8, 111/8, 112/8, 113/8, 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, 133/8, 175/8, 180/8,
182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8,
219/8, 220/8, 221/8, 222/8, 223/8,
ARIN Region Analysis Summary
----------------------------
Prefixes being announced by ARIN Region ASes: 138605
Total ARIN prefixes after maximum aggregation: 70811
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 111045
Unique aggregates announced from the ARIN address blocks: 44885
ARIN Region origin ASes present in the Internet Routing Table: 14277
ARIN Prefixes per ASN: 7.78
ARIN Region origin ASes announcing only one prefix: 5432
ARIN Region transit ASes present in the Internet Routing Table: 1472
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 23
Number of ARIN region 32-bit ASNs visible in the Routing Table: 10
Number of ARIN addresses announced to Internet: 797226496
Equivalent to 47 /8s, 132 /16s and 182 /24s
Percentage of available ARIN address space announced: 63.4
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
53248-55295, 393216-394239
ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8,
12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8,
20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8,
29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8,
40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8,
53/8, 54/8, 55/8, 56/8, 57/8, 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, 100/8, 104/8, 107/8, 108/8, 173/8,
174/8, 184/8, 199/8, 204/8, 205/8, 206/8, 207/8,
208/8, 209/8, 214/8, 215/8, 216/8,
RIPE Region Analysis Summary
----------------------------
Prefixes being announced by RIPE Region ASes: 82875
Total RIPE prefixes after maximum aggregation: 47359
RIPE Deaggregation factor: 1.75
Prefixes being announced from the RIPE address blocks: 76234
Unique aggregates announced from the RIPE address blocks: 50044
RIPE Region origin ASes present in the Internet Routing Table: 15444
RIPE Prefixes per ASN: 4.94
RIPE Region origin ASes announcing only one prefix: 7777
RIPE Region transit ASes present in the Internet Routing Table: 2412
Average RIPE Region AS path length visible: 4.6
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 684
Number of RIPE addresses announced to Internet: 465041152
Equivalent to 27 /8s, 183 /16s and 247 /24s
Percentage of available RIPE address space announced: 74.9
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, 47104-52223, 56320-58367
196608-198655
RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8,
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, 109/8,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,
LACNIC Region Analysis Summary
------------------------------
Prefixes being announced by LACNIC Region ASes: 32341
Total LACNIC prefixes after maximum aggregation: 7367
LACNIC Deaggregation factor: 4.39
Prefixes being announced from the LACNIC address blocks: 31251
Unique aggregates announced from the LACNIC address blocks: 16237
LACNIC Region origin ASes present in the Internet Routing Table: 1436
LACNIC Prefixes per ASN: 21.76
LACNIC Region origin ASes announcing only one prefix: 434
LACNIC Region transit ASes present in the Internet Routing Table: 265
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 181
Number of LACNIC addresses announced to Internet: 81456768
Equivalent to 4 /8s, 218 /16s and 238 /24s
Percentage of available LACNIC address space announced: 53.9
LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 plus ERX transfers
LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
200/8, 201/8,
AfriNIC Region Analysis Summary
-------------------------------
Prefixes being announced by AfriNIC Region ASes: 7620
Total AfriNIC prefixes after maximum aggregation: 1814
AfriNIC Deaggregation factor: 4.20
Prefixes being announced from the AfriNIC address blocks: 5993
Unique aggregates announced from the AfriNIC address blocks: 1854
AfriNIC Region origin ASes present in the Internet Routing Table: 437
AfriNIC Prefixes per ASN: 13.71
AfriNIC Region origin ASes announcing only one prefix: 129
AfriNIC Region transit ASes present in the Internet Routing Table: 95
Average AfriNIC Region AS path length visible: 5.3
Max AfriNIC Region AS path length visible: 31
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 22659584
Equivalent to 1 /8s, 89 /16s and 194 /24s
Percentage of available AfriNIC address space announced: 33.8
AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,
APNIC Region per AS prefix count summary
----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
4766 2409 9509 896 Korea Telecom (KIX)
7545 1553 301 83 TPG Internet Pty Ltd
4755 1481 653 159 TATA Communications formerly
17974 1455 480 33 PT TELEKOMUNIKASI INDONESIA
24560 1130 321 203 Bharti Airtel Ltd., Telemedia
9583 1055 77 493 Sify Limited
4808 1026 2096 294 CNCGROUP IP network: China169
9829 1004 868 53 BSNL National Internet Backbo
18101 938 116 142 Reliance Infocom Ltd Internet
17488 935 162 98 Hathway IP Over Cable Interne
Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
6389 3673 3838 257 bellsouth.net, inc.
4323 2566 1093 401 Time Warner Telecom
1785 1786 681 131 PaeTec Communications, Inc.
18566 1606 331 195 Covad Communications
6478 1571 302 36 AT&T Worldnet Services
20115 1530 1540 650 Charter Communications
19262 1487 4935 303 Verizon Global Networks
7018 1357 6675 883 AT&T WorldNet Services
11492 1325 240 15 Cable One
22773 1285 2865 79 Cox Communications, Inc.
Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
6830 515 1780 318 UPC Distribution Services
3292 454 2013 391 TDC Tele Danmark
34984 454 95 205 BILISIM TELEKOM
8866 443 133 24 Bulgarian Telecommunication C
9198 422 267 15 Kazakhtelecom Data Network Ad
3320 412 7604 359 Deutsche Telekom AG
20940 411 98 317 Akamai Technologies European
8551 402 353 46 Bezeq International
12479 397 577 6 Uni2 Autonomous System
702 393 1800 307 UUNET - Commercial IP service
Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
10620 1401 261 153 TVCABLE BOGOTA
28573 1248 970 83 NET Servicos de Comunicao S.A
8151 1236 2671 366 UniNet S.A. de C.V.
6503 1221 354 73 AVANTEL, S.A.
7303 923 465 148 Telecom Argentina Stet-France
14420 638 52 91 CORPORACION NACIONAL DE TELEC
22047 567 310 15 VTR PUNTO NET S.A.
3816 515 225 98 Empresa Nacional de Telecomun
13489 490 213 111 Orbitel S.A. E.S.P.
11172 487 83 80 Servicios Alestra S.A de C.V
Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
8452 843 445 11 TEDATA
24863 774 147 39 LINKdotNET AS number
15475 421 90 8 Nile Online
36992 298 271 14 Etisalat MISR
3741 265 985 227 The Internet Solution
24835 232 78 10 RAYA Telecom - Egypt
33776 230 13 5 Starcomms Nigeria Limited
6713 211 199 11 Itissalat Al-MAGHRIB
29571 192 17 11 Ci Telecom Autonomous system
16637 148 441 86 MTN Network Solutions
Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
6389 3673 3838 257 bellsouth.net, inc.
4323 2566 1093 401 Time Warner Telecom
4766 2409 9509 896 Korea Telecom (KIX)
23456 2001 489 1093 32-bit ASN transition
1785 1786 681 131 PaeTec Communications, Inc.
18566 1606 331 195 Covad Communications
6478 1571 302 36 AT&T Worldnet Services
7545 1553 301 83 TPG Internet Pty Ltd
20115 1530 1540 650 Charter Communications
19262 1487 4935 303 Verizon Global Networks
Complete listing at http://thyme.rand.apnic.net/current/data-ASnet
Global Per AS Maximum Aggr summary
----------------------------------
ASN No of nets Net Savings Description
4323 2566 2165 Time Warner Telecom
1785 1786 1655 PaeTec Communications, Inc.
6478 1571 1535 AT&T Worldnet Services
4766 2409 1513 Korea Telecom (KIX)
7545 1553 1470 TPG Internet Pty Ltd
17974 1455 1422 PT TELEKOMUNIKASI INDONESIA
18566 1606 1411 Covad Communications
4755 1481 1322 TATA Communications formerly
11492 1325 1310 Cable One
10620 1401 1248 TVCABLE BOGOTA
Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
32567 UNALLOCATED 12.14.170.0/24 4323 Time Warner Telecom
13746 UNALLOCATED 12.24.56.0/24 7018 AT&T WorldNet Servic
32567 UNALLOCATED 12.25.107.0/24 4323 Time Warner Telecom
26973 UNALLOCATED 12.39.152.0/24 7018 AT&T WorldNet Servic
26973 UNALLOCATED 12.39.154.0/23 7018 AT&T WorldNet Servic
26973 UNALLOCATED 12.39.155.0/24 7018 AT&T WorldNet Servic
26973 UNALLOCATED 12.39.159.0/24 7018 AT&T WorldNet Servic
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
Complete listing at http://thyme.rand.apnic.net/current/data-badAS
Advertised Unallocated Addresses
--------------------------------
Network Origin AS Description
2.56.0.0/16 44559 E-Rent LLC
24.225.128.0/18 36377 Comcast Telecommunications, I
24.225.192.0/23 36377 Comcast Telecommunications, I
24.225.192.0/18 36377 Comcast Telecommunications, I
24.225.224.0/21 36377 Comcast Telecommunications, I
24.225.237.0/24 36377 Comcast Telecommunications, I
24.225.248.0/21 36377 Comcast Telecommunications, I
31.186.112.0/21 8681 Jersey Telecoms Island Networ
31.186.160.0/21 35467 DataCenter Fryslan AS
41.57.192.0/18 22750 BCSNET
Complete listing at http://thyme.rand.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 /9:11 /10:26 /11:74 /12:218
/13:448 /14:766 /15:1370 /16:11586 /17:5699 /18:9423
/19:19078 /20:24728 /21:25237 /22:33660 /23:32188 /24:183717
/25:1131 /26:1289 /27:700 /28:40 /29:9 /30:2
/31:0 /32:6
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
6389 2267 3673 bellsouth.net, inc.
18566 1585 1606 Covad Communications
6478 1525 1571 AT&T Worldnet Services
4323 1377 2566 Time Warner Telecom
10620 1292 1401 TVCABLE BOGOTA
11492 1273 1325 Cable One
23456 1085 2001 32-bit ASN transition
7011 1063 1164 Citizens Utilities
1785 1056 1786 PaeTec Communications, Inc.
6503 997 1221 AVANTEL, S.A.
Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:288 2:54 4:14 5:1 8:346 12:2020
13:1 14:429 15:15 16:3 17:8 20:9
23:3 24:1571 27:699 31:14 32:60 33:3
34:2 37:1 38:749 39:1 40:101 41:2367
44:3 46:750 47:4 49:146 50:119 52:13
55:5 56:2 57:30 58:817 59:500 60:387
61:1167 62:1005 63:1919 64:3881 65:2354 66:4375
67:1799 68:1061 69:2912 70:701 71:359 72:1900
73:1 74:2327 75:284 76:337 77:842 78:696
79:455 80:1087 81:826 82:511 83:463 84:647
85:1027 86:553 87:760 88:343 89:1567 90:176
91:3657 92:504 93:1044 94:1228 95:776 96:452
97:251 98:809 99:35 101:49 106:1 107:4
108:47 109:925 110:517 111:703 112:325 113:378
114:511 115:720 116:972 117:672 118:758 119:1096
120:281 121:760 122:1607 123:1059 124:1323 125:1256
128:234 129:171 130:173 131:564 132:101 133:20
134:216 135:49 136:212 137:142 138:299 139:112
140:485 141:173 142:380 143:391 144:476 145:52
146:440 147:192 148:634 149:271 150:167 151:187
152:298 153:180 154:3 155:389 156:185 157:347
158:131 159:377 160:313 161:208 162:278 163:165
164:493 165:350 166:501 167:413 168:721 169:155
170:776 171:70 172:2 173:1256 174:529 175:350
177:66 178:756 180:791 181:4 182:411 183:239
184:230 185:1 186:1106 187:899 188:918 189:1027
190:4732 192:5768 193:4788 194:3487 195:2939 196:1212
197:15 198:3591 199:3885 200:5581 201:1585 202:8395
203:8458 204:4114 205:2313 206:2647 207:3025 208:3907
209:3496 210:2725 211:1363 212:1953 213:1712 214:761
215:66 216:4881 217:1621 218:556 219:382 220:1192
221:478 222:317 223:103
End of report
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