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.

Saturday, July 23, 2011

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Sun 24 Jul, 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: 370325
Prefixes after maximum aggregation: 166916
Deaggregation factor: 2.22
Unique aggregates announced to Internet: 180785
Total ASes present in the Internet Routing Table: 38297
Prefixes per ASN: 9.67
Origin-only ASes present in the Internet Routing Table: 31789
Origin ASes announcing only one prefix: 15261
Transit ASes present in the Internet Routing Table: 5225
Transit-only ASes present in the Internet Routing Table: 139
Average AS path length visible in the Internet Routing Table: 4.2
Max AS path length visible: 39
Max AS path prepend of ASN (22394) 31
Prefixes from unregistered ASNs in the Routing Table: 4044
Unregistered ASNs in the Routing Table: 578
Number of 32-bit ASNs allocated by the RIRs: 1585
Number of 32-bit ASNs visible in the Routing Table: 1283
Prefixes from 32-bit ASNs in the Routing Table: 2960
Special use prefixes present in the Routing Table: 78
Prefixes being announced from unallocated address space: 120
Number of addresses announced to Internet: 2485120063
Equivalent to 148 /8s, 31 /16s and 236 /24s
Percentage of available address space announced: 67.0
Percentage of allocated address space announced: 67.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 91.1
Total number of prefixes smaller than registry allocations: 154096

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

Prefixes being announced by APNIC Region ASes: 89221
Total APNIC prefixes after maximum aggregation: 29225
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 85902
Unique aggregates announced from the APNIC address blocks: 37456
APNIC Region origin ASes present in the Internet Routing Table: 4506
APNIC Prefixes per ASN: 19.06
APNIC Region origin ASes announcing only one prefix: 1260
APNIC Region transit ASes present in the Internet Routing Table: 710
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 62
Number of APNIC addresses announced to Internet: 622266881
Equivalent to 37 /8s, 23 /16s and 10 /24s
Percentage of available APNIC address space announced: 78.9

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: 145373
Total ARIN prefixes after maximum aggregation: 75125
ARIN Deaggregation factor: 1.94
Prefixes being announced from the ARIN address blocks: 116894
Unique aggregates announced from the ARIN address blocks: 46631
ARIN Region origin ASes present in the Internet Routing Table: 14521
ARIN Prefixes per ASN: 8.05
ARIN Region origin ASes announcing only one prefix: 5560
ARIN Region transit ASes present in the Internet Routing Table: 1521
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 35
Number of ARIN region 32-bit ASNs visible in the Routing Table: 12
Number of ARIN addresses announced to Internet: 802796184
Equivalent to 47 /8s, 217 /16s and 178 /24s
Percentage of available ARIN address space announced: 63.8

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: 90029
Total RIPE prefixes after maximum aggregation: 49691
RIPE Deaggregation factor: 1.81
Prefixes being announced from the RIPE address blocks: 82672
Unique aggregates announced from the RIPE address blocks: 52752
RIPE Region origin ASes present in the Internet Routing Table: 15833
RIPE Prefixes per ASN: 5.22
RIPE Region origin ASes announcing only one prefix: 7839
RIPE Region transit ASes present in the Internet Routing Table: 2526
Average RIPE Region AS path length visible: 4.1
Max RIPE Region AS path length visible: 39
Number of RIPE region 32-bit ASNs visible in the Routing Table: 933
Number of RIPE addresses announced to Internet: 484732812
Equivalent to 28 /8s, 228 /16s and 111 /24s
Percentage of available RIPE address space announced: 78.1

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: 34074
Total LACNIC prefixes after maximum aggregation: 7638
LACNIC Deaggregation factor: 4.46
Prefixes being announced from the LACNIC address blocks: 33329
Unique aggregates announced from the LACNIC address blocks: 17133
LACNIC Region origin ASes present in the Internet Routing Table: 1491
LACNIC Prefixes per ASN: 22.35
LACNIC Region origin ASes announcing only one prefix: 448
LACNIC Region transit ASes present in the Internet Routing Table: 276
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 20
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 272
Number of LACNIC addresses announced to Internet: 86439424
Equivalent to 5 /8s, 38 /16s and 246 /24s
Percentage of available LACNIC address space announced: 57.2

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: 8378
Total AfriNIC prefixes after maximum aggregation: 1974
AfriNIC Deaggregation factor: 4.24
Prefixes being announced from the AfriNIC address blocks: 6487
Unique aggregates announced from the AfriNIC address blocks: 2001
AfriNIC Region origin ASes present in the Internet Routing Table: 475
AfriNIC Prefixes per ASN: 13.66
AfriNIC Region origin ASes announcing only one prefix: 154
AfriNIC Region transit ASes present in the Internet Routing Table: 105
Average AfriNIC Region AS path length visible: 4.1
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 4
Number of AfriNIC addresses announced to Internet: 24516352
Equivalent to 1 /8s, 118 /16s and 23 /24s
Percentage of available AfriNIC address space announced: 36.5

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 1915 11053 638 Korea Telecom (KIX)
17974 1790 516 31 PT TELEKOMUNIKASI INDONESIA
7545 1554 301 85 TPG Internet Pty Ltd
4755 1459 375 169 Videsh Sanchar Nigam Ltd. Aut
7552 1298 1064 7 Vietel Corporation
24560 1161 336 187 Bharti Airtel Ltd.
9829 1113 929 42 BSNL National Internet Backbo
9583 1056 77 497 Sify Limited
4808 1018 2057 287 CNCGROUP IP network: China169
17488 980 188 112 Hathway IP Over Cable Interne

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 3616 3818 238 bellsouth.net, inc.
18566 1957 372 223 Covad Communications
1785 1812 681 123 AppliedTheory Corporation
4323 1613 1098 401 Time Warner Telecom
20115 1590 1538 623 Charter Communications
19262 1412 4760 392 Verizon Global Networks
7029 1379 1014 204 Windstream Communications Inc
7018 1373 7085 900 AT&T WorldNet Services
22773 1353 2897 89 Cox Communications, Inc.
2386 1258 520 907 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 1030 797 186 KPNQwest Backbone AS
9116 540 326 31 Goldenlines main autonomous s
34984 534 106 185 Tellcom Iletisim Hizmetleri
3292 521 2078 403 TDC Tele Danmark
6830 514 1788 317 UPC Distribution Services
20940 465 133 358 Akamai Technologies European
8866 455 133 26 Bulgarian Telecommunication C
12479 454 593 7 Uni2 Autonomous System
29049 432 32 47 AzerSat LLC.
3320 423 8151 369 Deutsche Telekom AG

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 1559 287 163 TVCABLE BOGOTA
8151 1384 2728 351 Uninet S.A. de C.V.
28573 1283 995 78 Types of queries are: POCs, o
7303 991 514 166 Telecom Argentina Stet-France
6503 745 354 69 AVANTEL, S.A.
14420 700 56 85 Types of queries are: POCs, o
22047 578 322 17 Types of queries are: POCs, o
10481 548 430 20 Prima S.A.
3816 533 232 97 COLOMBIA TELECOMUNICACIONES S
7738 516 986 31 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
24863 795 147 41 LINKdotNET AS number
36992 770 469 19 Etisalat MISR
8452 762 445 11 TEDATA
16637 300 441 87 Johnnic e-Ventures
3741 265 937 226 The Internet Solution
6713 241 215 13 Itissalat Al-MAGHRIB
33776 226 13 5 Starcomms Nigeria Limited
24835 161 78 10 RAYA Telecom - Egypt
15706 158 32 6 Sudatel Internet Exchange Aut
29571 158 17 11 Ci Telecom Autonomous system

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 3616 3818 238 bellsouth.net, inc.
23456 2960 714 1588 >>UNKNOWN<<
18566 1957 372 223 Covad Communications
4766 1915 11053 638 Korea Telecom (KIX)
1785 1812 681 123 AppliedTheory Corporation
17974 1790 516 31 PT TELEKOMUNIKASI INDONESIA
4323 1613 1098 401 Time Warner Telecom
20115 1590 1538 623 Charter Communications
10620 1559 287 163 TVCABLE BOGOTA
7545 1554 301 85 TPG Internet Pty Ltd

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

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

ASN No of nets Net Savings Description
17974 1790 1759 PT TELEKOMUNIKASI INDONESIA
18566 1957 1734 Covad Communications
1785 1812 1689 AppliedTheory Corporation
7545 1554 1469 TPG Internet Pty Ltd
10620 1559 1396 TVCABLE BOGOTA
23456 2960 1372 >>UNKNOWN<<
7552 1298 1291 Vietel Corporation
4755 1459 1290 Videsh Sanchar Nigam Ltd. Aut
4766 1915 1277 Korea Telecom (KIX)
22773 1353 1264 Cox Communications, Inc.

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
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
23502 UNALLOCATED 12.44.44.0/24 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
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
41.222.79.0/24 36938 >>UNKNOWN<<
41.223.92.0/22 36936 >>UNKNOWN<<
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless

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 /8:20 /9:12 /10:27 /11:80 /12:232
/13:465 /14:804 /15:1430 /16:12155 /17:6137 /18:10131
/19:20069 /20:27348 /21:26798 /22:35402 /23:34477 /24:191889
/25:380 /26:350 /27:177 /28:309 /29:229 /30:683
/31:63 /32:658

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

ASN No of nets Total ann. Description
6389 2236 3616 bellsouth.net, inc.
18566 1907 1957 Covad Communications
23456 1469 2960 >>UNKNOWN<<
10620 1454 1559 TVCABLE BOGOTA
11492 1096 1142 Cable One
7029 1070 1379 Windstream Communications Inc
7011 1055 1157 Citizens Utilities
1785 1054 1812 AppliedTheory Corporation
6478 997 1025 AT&T Worldnet Services
286 891 1030 KPNQwest Backbone AS

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

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

1:335 2:67 4:20 5:1 6:3 8:339
12:1967 13:1 14:492 15:15 16:3 17:5
20:10 23:14 24:1685 27:844 31:508 32:135
33:4 34:2 36:4 38:730 40:104 41:2573
42:35 44:3 46:1057 47:3 49:200 50:383
52:13 54:2 55:4 56:2 57:45 58:862
59:482 60:381 61:1182 62:1055 63:1955 64:4045
65:2298 66:3924 67:1918 68:1285 69:3171 70:813
71:373 72:1902 73:1 74:2473 75:336 76:349
77:894 78:713 79:488 80:1122 81:880 82:517
83:472 84:702 85:1084 86:538 87:784 88:339
89:1577 90:224 91:3969 92:527 93:1078 94:1366
95:918 96:424 97:263 98:929 99:37 101:77
103:143 106:75 107:25 108:81 109:1032 110:618
111:714 112:305 113:412 114:563 115:684 116:999
117:690 118:862 119:1170 120:315 121:692 122:1608
123:975 124:1305 125:1280 128:247 129:172 130:170
131:582 132:112 133:21 134:215 135:52 136:215
137:139 138:300 139:129 140:480 141:252 142:406
143:416 144:476 145:54 146:453 147:223 148:616
149:249 150:159 151:189 152:336 153:182 154:5
155:395 156:196 157:351 158:140 159:455 160:315
161:204 162:310 163:166 164:506 165:395 166:533
167:435 168:740 169:154 170:845 171:80 172:1
173:1632 174:626 175:381 176:144 177:170 178:1021
180:914 181:24 182:513 183:233 184:343 185:1
186:1310 187:748 188:894 189:949 190:5013 192:5945
193:5016 194:3577 195:3183 196:1213 197:43 198:3596
199:3990 200:5561 201:1477 202:8388 203:8445 204:4236
205:2355 206:2732 207:2818 208:4120 209:3525 210:2686
211:1450 212:2140 213:1818 214:756 215:70 216:5008
217:1666 218:547 219:345 220:1234 221:498 222:360
223:221

End of report
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