Weekly Routing Table Report
Routing Table Analysis
cscora at thyme.apnic.net
Fri Jan 18 05:08:25 EST 2002
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 a graphical representation, please see http://www.apnic.net/stats/bgp.
If you have any comments please contact Philip Smith <pfs at cisco.com>.
Routing Table Report 20:00 +10GMT Fri 18 Jan, 2002
Analysis Summary
----------------
BGP routing table entries examined: 108261
Prefixes after maximum aggregation: 72190
Unique aggregates announced to Internet: 52166
Total ASes present in the Internet Routing Table: 12391
Origin-only ASes present in the Internet Routing Table: 10752
Origin ASes announcing only one prefix: 4679
Transit ASes present in the Internet Routing Table: 1639
Transit-only ASes present in the Internet Routing Table: 56
Average AS path length visible in the Internet Routing Table: 5.3
Max AS path length visible: 16
Illegal AS announcements present in the Routing Table: 3
Non-routable prefixes present in the Routing Table: 0
Prefixes being announced from the IANA Reserved Address blocks: 16
Number of addresses announced to Internet: 1178011528
Equivalent to 70 /8s, 55 /16s and 7 /24s
Percentage of available address space announced: 31.8
Percentage of allocated address space announced: 60.1
Percentage of available address space allocated: 52.8
Total number of prefixes smaller than registry allocations: 72395
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 17281
Total APNIC prefixes after maximum aggregation: 10639
Prefixes being announced from the APNIC address blocks: 15741
Unique aggregates announced from the APNIC address blocks: 9781
APNIC Region origin ASes present in the Internet Routing Table: 1431
APNIC Region origin ASes announcing only one prefix: 470
APNIC Region transit ASes present in the Internet Routing Table: 248
Average APNIC Region AS path length visible: 5.3
Max APNIC Region AS path length visible: 15
Number of APNIC addresses announced to Internet: 78623808
Equivalent to 4 /8s, 175 /16s and 180 /24s
Percentage of available APNIC address space announced: 58.1
APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239
17408 - 18431, 23552 - 24575
APNIC Address Blocks 61/8, 202/7, 210/7, 218/7 and 220/8
ARIN Region Analysis Summary
----------------------------
Prefixes being announced by ARIN Region ASes: 73140
Total ARIN prefixes after maximum aggregation: 47605
Prefixes being announced from the ARIN address blocks: 51855
Unique aggregates announced from the ARIN address blocks: 17055
ARIN Region origin ASes present in the Internet Routing Table: 7341
ARIN Region origin ASes announcing only one prefix: 2282
ARIN Region transit ASes present in the Internet Routing Table: 742
Average ARIN Region AS path length visible: 5.2
Max ARIN Region AS path length visible: 16
Number of ARIN addresses announced to Internet: 183883716
Equivalent to 10 /8s, 245 /16s and 215 /24s
Percentage of available ARIN address space announced: 68.5
ARIN AS Blocks 1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106
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
ARIN Address Blocks 24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6,
208/7 and 216/8
RIPE Region Analysis Summary
----------------------------
Prefixes being announced by RIPE Region ASes: 17839
Total RIPE prefixes after maximum aggregation: 13946
Prefixes being announced from the RIPE address blocks: 14571
Unique aggregates announced from the RIPE address blocks: 9728
RIPE Region origin ASes present in the Internet Routing Table: 3563
RIPE Region origin ASes announcing only one prefix: 1927
RIPE Region transit ASes present in the Internet Routing Table: 641
Average RIPE Region AS path length visible: 5.8
Max RIPE Region AS path length visible: 15
Number of RIPE addresses announced to Internet: 106005504
Equivalent to 6 /8s, 81 /16s and 132 /24s
Percentage of available RIPE address space announced: 70.2
RIPE AS Blocks 1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614
2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631
6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383
20480 - 21503, 24576 - 25599
RIPE Address Blocks 62/8, 80/7, 193/8, 194/7, 212/7 and 217/8
APNIC Region per AS prefix count summary
----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1221 1337 1243 982 Telstra Pty Ltd
4538 448 1098 14 China Education and Research
703 402 341 306 UUNET Technologies, Inc.
2764 393 377 369 connect.com.au pty ltd
2907 392 1905 362 SINET Japan
7474 315 286 206 Optus Communications Pty Ltd
4755 302 114 95 Videsh Sanchar Nigam Ltd. Aut
4134 268 1858 100 Data Communications Bureau
4766 190 1391 152 Korea Internet Exchange for "
17557 183 14 84 Pakistan Telecom
9443 160 44 59 Primus Telecommunications
7539 151 138 150 TANet2, sponsored by NSC, TAI
4740 147 34 121 OzEmail ISP
1659 144 924 34 Taiwan Academic Network (TANe
9583 144 32 5 Satyam Infoway Ltd.,
9768 144 385 88 Korea Telecom
7657 124 21 84 The Internet Group Limited
17676 121 1920 7 XTAGE CORPORATION
4713 115 894 102 NTT Communications Corporatio
4780 114 186 40 Digital United Inc.
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
702 1091 2617 859 UUNET Technologies, Inc.
3301 400 924 351 TeliaNet Sweden
1257 255 489 249 SWIPnet Swedish IP Network
3215 234 562 152 France Telecom / &Equant
680 233 2149 231 DFN-IP service G-WiN
5515 219 705 176 Sonera Finland Autonomous Sys
3320 192 1961 170 Deutsche Telekom AG
786 182 1874 182 The JANET IP Service
719 164 289 118 LANLINK autonomous system
5400 155 62 86 Concert European Core Network
8708 150 20 140 Romania Data Systems S.A.
2856 135 775 124 BTnet UK Regional network
3303 125 575 124 Swisscom Ltd
3269 115 663 70 TELECOM ITALIA
12302 114 7 35 MobiFon S.A.
8297 113 37 62 Teleglobe Autonomous System i
517 104 227 102 KPNQwest Germany GmbH
1290 96 412 71 PSINet UK Ltd.
5549 96 78 59 Nextra Deutschland GmbH + Co.
1267 92 1471 42 Infostrada S.p.A.
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
701 2124 8806 1533 UUNET Technologies, Inc.
7018 1715 7563 971 AT&T
1 854 8312 620 BBN Planet
3908 782 1656 462 Supernet, Inc.
1239 776 3156 603 Sprint
3967 680 369 271 Exodus Communication
7046 635 836 426 UUNET Technologies, Inc.
4323 617 412 216 Time Warner Communications, I
852 583 978 380 Telus Advanced Communications
690 539 77 318 Merit Network
209 513 1875 293 Qwest
705 492 449 308 UUNET Technologies, Inc.
2914 455 2192 424 Verio, Inc.
7132 448 502 159 Southwestern Bell Internet Se
4293 418 90 310 Cable & Wireless USA
3549 417 835 211 Global Crossing
2149 389 214 326 Performance Systems, Inc.
2386 384 354 243 AT&T Data Communications Serv
3561 369 2236 324 Cable & Wireless USA
577 354 604 222 Bell Advanced Communications
Global Per AS Maximum Aggr summary
----------------------------------
ASN No of nets Net Savings Description
7018 1715 744 AT&T
4538 448 434 China Education and Research
3967 680 409 Exodus Communication
4323 617 401 Time Warner Communications, I
1221 1337 355 Telstra Pty Ltd
3908 782 320 Supernet, Inc.
4151 336 320 USDA
7132 448 289 Southwestern Bell Internet Se
11371 278 271 Rhythms NetConnections
6347 322 241 SAVVIS Communications Corpora
1 854 234 BBN Planet
702 1091 232 UUNET Technologies, Inc.
690 539 221 Merit Network
209 513 220 Qwest
7046 635 209 UUNET Technologies, Inc.
4755 302 207 Videsh Sanchar Nigam Ltd. Aut
3549 417 206 Global Crossing
4355 237 206 EarthLink, Inc.
852 583 203 Telus Advanced Communications
6517 229 197 Yipes Communications, Inc.
List of Unregistered ASNs (Global)
----------------------------------
Bad AS Designation Network Transit AS Description
1877 UNALLOCATED 192.108.201.0/24 1880 Stupi, house man's p
5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies,
65001 PRIVATE 212.143.172.0/22 1680 NetVision Elronet As
Advertised Unregistered Addresses
---------------------------------
Network Origin AS Description
39.0.0.0/8 4554 Exchange Point Blocks
126.0.0.0/8 7336 Compass Communications
132.0.0.0/10 568 DISO-UNRRA
134.137.0.0/16 400 Headquarters Standard Systems
135.0.0.0/13 10455 Lucent Technologies
137.0.0.0/13 568 DISO-UNRRA
138.94.0.0/16 1 BBN Planet
144.7.0.0/16 701 UUNET Technologies, Inc.
153.34.0.0/15 701 UUNET Technologies, Inc.
153.36.0.0/14 701 UUNET Technologies, Inc.
154.150.0.0/16 6494 IDCI
158.0.0.0/13 568 DISO-UNRRA
164.233.0.0/16 6020 DISA NETWORK SERVICES
164.235.0.0/16 6025 US DOD NIC Unregistered
191.9.200.0/24 1290 PSINet UK Ltd.
201.115.100.0/24 7018 AT&T
Number of prefixes announced per prefix length (Global)
-------------------------------------------------------
/1:0 /2:0 /3:0 /4:0 /5:0 /6:0
/7:0 /8:19 /9:6 /10:7 /11:12 /12:38
/13:93 /14:230 /15:392 /16:7144 /17:1413 /18:2475
/19:7271 /20:6658 /21:4860 /22:7327 /23:9034 /24:60417
/25:219 /26:212 /27:116 /28:92 /29:65 /30:124
/31:0 /32:37
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
701 1351 2124 UUNET Technologies, Inc.
1221 1189 1337 Telstra Pty Ltd
7018 1142 1715 AT&T
702 713 1091 UUNET Technologies, Inc.
690 535 539 Merit Network
3908 535 782 Supernet, Inc.
4323 508 617 Time Warner Communications, I
3967 488 680 Exodus Communication
7046 466 635 UUNET Technologies, Inc.
1239 448 776 Sprint
1 441 854 BBN Planet
4293 406 418 Cable & Wireless USA
852 369 583 Telus Advanced Communications
705 358 492 UUNET Technologies, Inc.
2764 348 393 connect.com.au pty ltd
209 339 513 Qwest
703 327 402 UUNET Technologies, Inc.
2386 307 384 AT&T Data Communications Serv
2149 292 389 Performance Systems, Inc.
4151 290 336 USDA
Number of /24s announced per /8 block (Global)
----------------------------------------------
4:2 9:1 12:726 13:10 15:2 17:5
20:1 24:712 25:1 32:181 38:12 40:4
43:1 44:2 57:14 61:225 62:161 63:1908
64:1114 65:985 66:578 67:31 68:20 80:144
81:3 128:63 129:125 130:23 131:44 132:13
133:2 134:121 135:10 136:118 137:104 138:62
139:30 140:100 141:58 142:64 143:42 144:54
145:12 146:216 147:60 148:175 149:86 150:38
151:43 152:393 153:34 154:7 155:83 156:81
157:122 158:72 159:79 160:26 161:55 162:96
163:128 164:132 165:114 166:225 167:160 168:119
169:48 170:281 171:4 191:1 192:5402 193:2092
194:2050 195:799 196:435 198:3766 199:3255 200:2394
201:1 202:2892 203:4483 204:3309 205:2169 206:2749
207:2631 208:2804 209:2916 210:534 211:182 212:863
213:540 214:7 215:17 216:2927 217:410 218:24
End of report
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