The Border Gateway Protocol (BGP) is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP) metrics, but makes routing decisions based on path, network policies and/or rulesets. For this reason, it is more appropriately termed a reachability protocol rather than routing protocol.

Thursday, March 10, 2011

[bgp-stats] Routing Table Report - RouteViews-3 view

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Fri 11 Mar, 2011

NB: RouteViews data includes iBGP information from some ASNs.
Treat the information provided below appropriately.

Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/rviews/

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

BGP routing table entries examined: 354400
Prefixes after maximum aggregation: 158899
Deaggregation factor: 2.23
Unique aggregates announced to Internet: 172768
Total ASes present in the Internet Routing Table: 36054
Prefixes per ASN: 9.83
Origin-only ASes present in the Internet Routing Table: 31191
Origin ASes announcing only one prefix: 14896
Transit ASes present in the Internet Routing Table: 4863
Transit-only ASes present in the Internet Routing Table: 119
Average AS path length visible in the Internet Routing Table: 3.9
Max AS path length visible: 25
Max AS path prepend of ASN (32374) 19
Prefixes from unregistered ASNs in the Routing Table: 476
Unregistered ASNs in the Routing Table: 211
Number of 32-bit ASNs allocated by the RIRs: 1189
Prefixes from 32-bit ASNs in the Routing Table: 2
Special use prefixes present in the Routing Table: 74
Prefixes being announced from unallocated address space: 257
Number of addresses announced to Internet: 2468885659
Equivalent to 147 /8s, 40 /16s and 52 /24s
Percentage of available address space announced: 66.6
Percentage of allocated address space announced: 66.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 89.1
Total number of prefixes smaller than registry allocations: 146315

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

Prefixes being announced by APNIC Region ASes: 85444
Total APNIC prefixes after maximum aggregation: 28575
APNIC Deaggregation factor: 2.99
Prefixes being announced from the APNIC address blocks: 82331
Unique aggregates announced from the APNIC address blocks: 36230
APNIC Region origin ASes present in the Internet Routing Table: 4336
APNIC Prefixes per ASN: 18.99
APNIC Region origin ASes announcing only one prefix: 1219
APNIC Region transit ASes present in the Internet Routing Table: 673
Average APNIC Region AS path length visible: 4.1
Max APNIC Region AS path length visible: 17
Number of APNIC addresses announced to Internet: 595747265
Equivalent to 35 /8s, 130 /16s and 97 /24s
Percentage of available APNIC address space announced: 75.6

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: 143284
Total ARIN prefixes after maximum aggregation: 73669
ARIN Deaggregation factor: 1.94
Prefixes being announced from the ARIN address blocks: 113564
Unique aggregates announced from the ARIN address blocks: 44958
ARIN Region origin ASes present in the Internet Routing Table: 14248
ARIN Prefixes per ASN: 7.97
ARIN Region origin ASes announcing only one prefix: 5385
ARIN Region transit ASes present in the Internet Routing Table: 1438
Average ARIN Region AS path length visible: 3.8
Max ARIN Region AS path length visible: 25
Number of ARIN addresses announced to Internet: 796511128
Equivalent to 47 /8s, 121 /16s and 203 /24s
Percentage of available ARIN address space announced: 63.3

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: 85711
Total RIPE prefixes after maximum aggregation: 47310
RIPE Deaggregation factor: 1.81
Prefixes being announced from the RIPE address blocks: 78208
Unique aggregates announced from the RIPE address blocks: 49595
RIPE Region origin ASes present in the Internet Routing Table: 15426
RIPE Prefixes per ASN: 5.07
RIPE Region origin ASes announcing only one prefix: 7736
RIPE Region transit ASes present in the Internet Routing Table: 2346
Average RIPE Region AS path length visible: 3.7
Max RIPE Region AS path length visible: 21
Number of RIPE addresses announced to Internet: 481151004
Equivalent to 28 /8s, 173 /16s and 200 /24s
Percentage of available RIPE address space announced: 77.5

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, 47104-52223, 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: 32191
Total LACNIC prefixes after maximum aggregation: 7412
LACNIC Deaggregation factor: 4.34
Prefixes being announced from the LACNIC address blocks: 31046
Unique aggregates announced from the LACNIC address blocks: 16123
LACNIC Region origin ASes present in the Internet Routing Table: 1434
LACNIC Prefixes per ASN: 21.65
LACNIC Region origin ASes announcing only one prefix: 428
LACNIC Region transit ASes present in the Internet Routing Table: 259
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 20
Number of LACNIC addresses announced to Internet: 81356684
Equivalent to 4 /8s, 217 /16s and 103 /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: 7510
Total AfriNIC prefixes after maximum aggregation: 1829
AfriNIC Deaggregation factor: 4.11
Prefixes being announced from the AfriNIC address blocks: 5883
Unique aggregates announced from the AfriNIC address blocks: 1848
AfriNIC Region origin ASes present in the Internet Routing Table: 434
AfriNIC Prefixes per ASN: 13.56
AfriNIC Region origin ASes announcing only one prefix: 128
AfriNIC Region transit ASes present in the Internet Routing Table: 97
Average AfriNIC Region AS path length visible: 3.8
Max AfriNIC Region AS path length visible: 17
Number of AfriNIC addresses announced to Internet: 22032896
Equivalent to 1 /8s, 80 /16s and 50 /24s
Percentage of available AfriNIC address space announced: 32.8

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 1860 9500 587 Korea Telecom (KIX)
7545 1579 301 84 TPG Internet Pty Ltd
4755 1473 653 156 Videsh Sanchar Nigam Ltd. Aut
17974 1409 467 28 PT TELEKOMUNIKASI INDONESIA
24560 1120 324 186 Bharti Airtel Ltd.
9583 1047 76 487 Sify Limited
9829 1004 868 53 BSNL National Internet Backbo
4808 1003 2086 285 CNCGROUP IP network: China169
17488 960 162 96 Hathway IP Over Cable Interne
18101 934 117 141 Reliance Infocom Ltd Internet

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

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

ASN No of nets /20 equiv MaxAgg Description
6389 3681 3839 259 bellsouth.net, inc.
4323 2586 1125 405 Time Warner Telecom
19262 1830 4953 283 Verizon Global Networks
1785 1795 681 131 AppliedTheory Corporation
20115 1576 1537 650 Charter Communications
6478 1537 298 82 AT&T Worldnet Services
18566 1525 326 180 Covad Communications
7018 1368 6739 891 AT&T WorldNet Services
11492 1311 236 66 Cable One
2386 1295 538 935 AT&T Data Communications Serv

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

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

ASN No of nets /20 equiv MaxAgg Description
286 1010 795 166 KPNQwest Backbone AS
9116 542 328 31 Goldenlines main autonomous s
6830 516 1780 318 UPC Distribution Services
3292 505 1996 390 TDC Tele Danmark
9198 470 267 15 Kazakhtelecom Corporate Sales
34984 466 98 145 Tellcom Iletisim Hizmetleri
8866 444 133 23 Bulgarian Telecommunication C
8402 420 320 31 Corbina telecom
20940 414 97 319 Akamai Technologies European
8551 405 355 38 Bezeq International

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

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

ASN No of nets /20 equiv MaxAgg Description
10620 1384 258 163 TVCABLE BOGOTA
8151 1365 2681 364 Uninet S.A. de C.V.
28573 1243 963 83 Types of queries are: POCs, o
6503 1185 354 74 AVANTEL, S.A.
7303 920 464 149 Telecom Argentina Stet-France
14420 644 56 93 Types of queries are: POCs, o
22047 541 310 15 Types of queries are: POCs, o
3816 517 225 96 COLOMBIA TELECOMUNICACIONES S
11172 489 99 83 Alestra
7738 479 922 30 Telecomunicacoes da Bahia S.A

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

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

ASN No of nets /20 equiv MaxAgg Description
8452 795 445 11 TEDATA
24863 762 147 37 LINKdotNET AS number
15475 423 90 8 Nile Online
36992 300 271 14 Etisalat MISR
3741 266 987 228 The Internet Solution
33776 230 13 5 Starcomms Nigeria Limited
24835 228 78 10 RAYA Telecom - Egypt
6713 204 199 11 Itissalat Al-MAGHRIB
29571 192 17 11 Ci Telecom Autonomous system
16637 142 422 86 Johnnic e-Ventures

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

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

ASN No of nets /20 equiv MaxAgg Description
6389 3681 3839 259 bellsouth.net, inc.
4323 2586 1125 405 Time Warner Telecom
4766 1860 9500 587 Korea Telecom (KIX)
19262 1830 4953 283 Verizon Global Networks
1785 1795 681 131 AppliedTheory Corporation
7545 1579 301 84 TPG Internet Pty Ltd
20115 1576 1537 650 Charter Communications
6478 1537 298 82 AT&T Worldnet Services
18566 1525 326 180 Covad Communications
4755 1473 653 156 Videsh Sanchar Nigam Ltd. Aut

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

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

ASN No of nets Net Savings Description
4323 2586 2181 Time Warner Telecom
1785 1795 1664 AppliedTheory Corporation
19262 1830 1547 Verizon Global Networks
7545 1579 1495 TPG Internet Pty Ltd
6478 1537 1455 AT&T Worldnet Services
17974 1409 1381 PT TELEKOMUNIKASI INDONESIA
18566 1525 1345 Covad Communications
4755 1473 1317 Videsh Sanchar Nigam Ltd. Aut
4766 1860 1273 Korea Telecom (KIX)
11492 1311 1245 Cable One

Complete listing at http://thyme.rand.apnic.net/rviews/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 7018 AT&T WorldNet Servic
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/rviews/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
10.29.244.56/29 286 KPNQwest Backbone AS
10.29.245.1/32 286 KPNQwest Backbone AS
10.29.245.2/32 286 KPNQwest Backbone AS
10.29.245.15/32 286 KPNQwest Backbone AS
10.29.245.19/32 286 KPNQwest Backbone AS
10.29.245.20/32 286 KPNQwest Backbone AS
10.29.245.21/32 286 KPNQwest Backbone AS
10.29.245.22/32 286 KPNQwest Backbone AS
10.29.245.25/32 286 KPNQwest Backbone AS
10.29.245.26/32 286 KPNQwest Backbone AS

Complete listing at http://thyme.rand.apnic.net/rviews/data-dsua

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

Network Origin AS Description
1.5.0.0/16 38639 NTT Communications Corporatio
1.6.0.0/15 38639 NTT Communications Corporatio
1.8.0.0/16 38639 NTT Communications Corporatio
1.20.0.0/16 38639 NTT Communications Corporatio
1.32.0.0/16 38639 NTT Communications Corporatio
1.37.0.0/16 38639 NTT Communications Corporatio
1.187.0.0/16 38639 NTT Communications Corporatio
14.0.0.0/24 38639 NTT Communications Corporatio
14.0.1.0/24 38639 NTT Communications Corporatio
14.0.2.0/23 38639 NTT Communications Corporatio

Complete listing at http://thyme.rand.apnic.net/rviews/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 /8:24 /9:11 /10:26 /11:74 /12:217
/13:447 /14:773 /15:1398 /16:11687 /17:5902 /18:9668
/19:19538 /20:25366 /21:25590 /22:33921 /23:32565 /24:184724
/25:368 /26:345 /27:157 /28:290 /29:160 /30:554
/31:53 /32:542

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

ASN No of nets Total ann. Description
6389 2271 3681 bellsouth.net, inc.
18566 1503 1525 Covad Communications
6478 1491 1537 AT&T Worldnet Services
4323 1391 2586 Time Warner Telecom
10620 1275 1384 TVCABLE BOGOTA
11492 1268 1311 Cable One
7011 1058 1159 Citizens Utilities
1785 1055 1795 AppliedTheory Corporation
6503 962 1185 AVANTEL, S.A.
19262 941 1830 Verizon Global Networks

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

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

1:268 2:75 4:18 5:1 8:342 12:2032
13:1 14:430 15:15 16:3 17:8 20:9
23:3 24:1529 27:607 31:4 32:127 33:4
34:2 36:2 37:1 38:716 39:1 40:101
41:2303 42:13 44:3 46:709 47:4 49:165
50:197 52:13 55:2 56:2 57:43 58:863
59:497 60:386 61:1140 62:1040 63:1931 64:3894
65:2353 66:4351 67:1798 68:1221 69:2987 70:746
71:404 72:2040 73:3 74:2407 75:297 76:349
77:847 78:704 79:458 80:1101 81:808 82:528
83:474 84:658 85:1063 86:575 87:787 88:358
89:1602 90:173 91:3616 92:495 93:1055 94:1236
95:799 96:471 97:250 98:809 99:34 101:56
106:1 107:4 108:129 109:918 110:478 111:721
112:321 113:382 114:494 115:714 116:974 117:690
118:713 119:1029 120:261 121:758 122:1614 123:1043
124:1314 125:1261 128:267 129:171 130:171 131:559
132:110 133:20 134:222 135:49 136:212 137:146
138:301 139:124 140:487 141:203 142:378 143:381
144:492 145:51 146:435 147:205 148:637 149:266
150:161 151:230 152:298 153:180 154:3 155:377
156:179 157:346 158:131 159:371 160:311 161:211
162:277 163:160 164:486 165:370 166:496 167:410
168:729 169:158 170:759 171:69 172:2 173:1268
174:520 175:323 177:35 178:791 180:814 181:4
182:387 183:243 184:295 186:1044 187:819 188:912
189:1032 190:4585 192:5807 193:4807 194:3538 195:3091
196:1218 197:4 198:3595 199:3872 200:5588 201:1597
202:8448 203:8494 204:4109 205:2312 206:2666 207:3069
208:3921 209:3483 210:2687 211:1355 212:1985 213:1764
214:749 215:63 216:4867 217:1659 218:560 219:383
220:1203 221:478 222:343 223:100

End of report
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