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.

Wednesday, July 6, 2011

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Thu 07 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: 368045
Prefixes after maximum aggregation: 166086
Deaggregation factor: 2.22
Unique aggregates announced to Internet: 179918
Total ASes present in the Internet Routing Table: 38151
Prefixes per ASN: 9.65
Origin-only ASes present in the Internet Routing Table: 31735
Origin ASes announcing only one prefix: 15200
Transit ASes present in the Internet Routing Table: 5176
Transit-only ASes present in the Internet Routing Table: 132
Average AS path length visible in the Internet Routing Table: 4.1
Max AS path length visible: 30
Max AS path prepend of ASN (22394) 27
Prefixes from unregistered ASNs in the Routing Table: 3900
Unregistered ASNs in the Routing Table: 522
Number of 32-bit ASNs allocated by the RIRs: 1524
Number of 32-bit ASNs visible in the Routing Table: 1240
Prefixes from 32-bit ASNs in the Routing Table: 2879
Special use prefixes present in the Routing Table: 78
Prefixes being announced from unallocated address space: 134
Number of addresses announced to Internet: 2494222151
Equivalent to 148 /8s, 170 /16s and 207 /24s
Percentage of available address space announced: 67.3
Percentage of allocated address space announced: 67.3
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 91.0
Total number of prefixes smaller than registry allocations: 153187

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

Prefixes being announced by APNIC Region ASes: 88053
Total APNIC prefixes after maximum aggregation: 29120
APNIC Deaggregation factor: 3.02
Prefixes being announced from the APNIC address blocks: 84904
Unique aggregates announced from the APNIC address blocks: 37082
APNIC Region origin ASes present in the Internet Routing Table: 4486
APNIC Prefixes per ASN: 18.93
APNIC Region origin ASes announcing only one prefix: 1258
APNIC Region transit ASes present in the Internet Routing Table: 704
Average APNIC Region AS path length visible: 4.4
Max APNIC Region AS path length visible: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 55
Number of APNIC addresses announced to Internet: 621416385
Equivalent to 37 /8s, 10 /16s and 15 /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
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: 144587
Total ARIN prefixes after maximum aggregation: 74744
ARIN Deaggregation factor: 1.93
Prefixes being announced from the ARIN address blocks: 116202
Unique aggregates announced from the ARIN address blocks: 46626
ARIN Region origin ASes present in the Internet Routing Table: 14478
ARIN Prefixes per ASN: 8.03
ARIN Region origin ASes announcing only one prefix: 5518
ARIN Region transit ASes present in the Internet Routing Table: 1508
Average ARIN Region AS path length visible: 3.6
Max ARIN Region AS path length visible: 30
Number of ARIN region 32-bit ASNs visible in the Routing Table: 13
Number of ARIN addresses announced to Internet: 819579800
Equivalent to 48 /8s, 217 /16s and 203 /24s
Percentage of available ARIN address space announced: 65.1

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: 89761
Total RIPE prefixes after maximum aggregation: 49439
RIPE Deaggregation factor: 1.82
Prefixes being announced from the RIPE address blocks: 82422
Unique aggregates announced from the RIPE address blocks: 52603
RIPE Region origin ASes present in the Internet Routing Table: 15812
RIPE Prefixes per ASN: 5.21
RIPE Region origin ASes announcing only one prefix: 7832
RIPE Region transit ASes present in the Internet Routing Table: 2497
Average RIPE Region AS path length visible: 4.3
Max RIPE Region AS path length visible: 24
Number of RIPE region 32-bit ASNs visible in the Routing Table: 915
Number of RIPE addresses announced to Internet: 479436492
Equivalent to 28 /8s, 147 /16s and 158 /24s
Percentage of available RIPE address space announced: 77.2

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: 34010
Total LACNIC prefixes after maximum aggregation: 7638
LACNIC Deaggregation factor: 4.45
Prefixes being announced from the LACNIC address blocks: 33132
Unique aggregates announced from the LACNIC address blocks: 16948
LACNIC Region origin ASes present in the Internet Routing Table: 1482
LACNIC Prefixes per ASN: 22.36
LACNIC Region origin ASes announcing only one prefix: 445
LACNIC Region transit ASes present in the Internet Routing Table: 272
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: 253
Number of LACNIC addresses announced to Internet: 85892104
Equivalent to 5 /8s, 30 /16s and 156 /24s
Percentage of available LACNIC address space announced: 56.9

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: 8448
Total AfriNIC prefixes after maximum aggregation: 1980
AfriNIC Deaggregation factor: 4.27
Prefixes being announced from the AfriNIC address blocks: 6495
Unique aggregates announced from the AfriNIC address blocks: 1985
AfriNIC Region origin ASes present in the Internet Routing Table: 471
AfriNIC Prefixes per ASN: 13.79
AfriNIC Region origin ASes announcing only one prefix: 147
AfriNIC Region transit ASes present in the Internet Routing Table: 105
Average AfriNIC Region AS path length visible: 4.2
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: 24312832
Equivalent to 1 /8s, 114 /16s and 252 /24s
Percentage of available AfriNIC address space announced: 36.2

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 1908 9536 631 Korea Telecom (KIX)
17974 1786 460 43 PT TELEKOMUNIKASI INDONESIA
7545 1547 301 85 TPG Internet Pty Ltd
4755 1489 375 167 Videsh Sanchar Nigam Ltd. Aut
24560 1153 336 187 Bharti Airtel Ltd.
9829 1098 914 45 BSNL National Internet Backbo
9583 1057 78 503 Sify Limited
4808 1022 2062 290 CNCGROUP IP network: China169
17488 979 186 105 Hathway IP Over Cable Interne
18101 932 116 140 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 3613 3819 247 bellsouth.net, inc.
18566 1957 372 223 Covad Communications
1785 1805 681 122 AppliedTheory Corporation
4323 1655 1098 400 Time Warner Telecom
20115 1594 1533 633 Charter Communications
19262 1450 4806 371 Verizon Global Networks
7018 1376 7086 902 AT&T WorldNet Services
7029 1358 967 205 Windstream Communications Inc
22773 1349 2897 88 Cox Communications, Inc.
6478 1343 249 617 AT&T Worldnet Services

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 1041 798 190 KPNQwest Backbone AS
9116 540 326 31 Goldenlines main autonomous s
34984 536 106 184 Tellcom Iletisim Hizmetleri
3292 520 2077 402 TDC Tele Danmark
6830 513 1780 317 UPC Distribution Services
20940 470 137 362 Akamai Technologies European
8866 452 134 26 Bulgarian Telecommunication C
12479 452 593 7 Uni2 Autonomous System
29049 440 33 45 AzerSat LLC.
3320 420 8151 367 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 1541 282 157 TVCABLE BOGOTA
8151 1436 2724 356 Uninet S.A. de C.V.
28573 1278 996 80 Types of queries are: POCs, o
7303 1002 509 177 Telecom Argentina Stet-France
6503 760 354 75 AVANTEL, S.A.
14420 688 55 83 Types of queries are: POCs, o
22047 576 322 17 Types of queries are: POCs, o
10481 548 430 20 Prima S.A.
3816 531 230 96 COLOMBIA TELECOMUNICACIONES S
27947 520 54 48 Telconet 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 790 147 37 LINKdotNET AS number
15475 524 74 8 Nile Online
36992 314 415 14 Etisalat MISR
16637 288 441 87 Johnnic e-Ventures
3741 261 937 223 The Internet Solution
6713 241 215 13 Itissalat Al-MAGHRIB
33776 227 13 5 Starcomms Nigeria Limited
24835 211 78 10 RAYA Telecom - Egypt
29571 192 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 3613 3819 247 bellsouth.net, inc.
23456 2879 698 1535 >>UNKNOWN<<
18566 1957 372 223 Covad Communications
4766 1908 9536 631 Korea Telecom (KIX)
1785 1805 681 122 AppliedTheory Corporation
17974 1786 460 43 PT TELEKOMUNIKASI INDONESIA
4323 1655 1098 400 Time Warner Telecom
20115 1594 1533 633 Charter Communications
7545 1547 301 85 TPG Internet Pty Ltd
10620 1541 282 157 TVCABLE BOGOTA

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 1786 1743 PT TELEKOMUNIKASI INDONESIA
18566 1957 1734 Covad Communications
1785 1805 1683 AppliedTheory Corporation
7545 1547 1462 TPG Internet Pty Ltd
10620 1541 1384 TVCABLE BOGOTA
23456 2879 1344 >>UNKNOWN<<
4755 1489 1322 Videsh Sanchar Nigam Ltd. Aut
4766 1908 1277 Korea Telecom (KIX)
22773 1349 1261 Cox Communications, Inc.
4323 1655 1255 Time Warner Telecom

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 4323 Time Warner Telecom
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
27.0.128.0/17 7514 Media Exchange, Inc.
41.190.32.0/23 31856 CABSAS
41.190.34.0/23 31856 CABSAS
41.190.36.0/23 31856 CABSAS

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 /8:22 /9:12 /10:28 /11:81 /12:230
/13:466 /14:809 /15:1425 /16:12109 /17:6133 /18:10105
/19:19981 /20:27004 /21:26629 /22:35033 /23:34126 /24:190859
/25:387 /26:355 /27:186 /28:361 /29:290 /30:702
/31:62 /32:650

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

ASN No of nets Total ann. Description
6389 2223 3613 bellsouth.net, inc.
18566 1907 1957 Covad Communications
10620 1436 1541 TVCABLE BOGOTA
23456 1419 2879 >>UNKNOWN<<
6478 1314 1343 AT&T Worldnet Services
11492 1094 1140 Cable One
7029 1056 1358 Windstream Communications Inc
7011 1054 1155 Citizens Utilities
1785 1052 1805 AppliedTheory Corporation
286 901 1041 KPNQwest Backbone AS

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

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

1:323 2:67 4:20 5:1 6:3 8:339
12:1978 13:1 14:479 15:15 16:3 17:5
20:10 23:13 24:1678 27:815 31:491 32:135
33:4 34:2 36:4 38:745 40:103 41:2588
42:31 44:3 46:1043 47:3 49:195 50:439
52:13 54:2 55:4 56:2 57:45 58:862
59:479 60:387 61:1176 62:1054 63:1951 64:3963
65:2302 66:3898 67:1932 68:1269 69:3151 70:802
71:389 72:1925 73:2 74:2440 75:325 76:349
77:927 78:717 79:483 80:1123 81:847 82:512
83:464 84:699 85:1086 86:554 87:782 88:341
89:1572 90:221 91:3953 92:539 93:1068 94:1370
95:909 96:448 97:255 98:903 99:36 101:77
103:106 106:10 107:20 108:80 109:1040 110:622
111:710 112:303 113:411 114:550 115:675 116:984
117:670 118:854 119:1150 120:311 121:690 122:1600
123:963 124:1301 125:1232 128:247 129:174 130:167
131:580 132:112 133:21 134:215 135:48 136:216
137:136 138:299 139:129 140:478 141:241 142:406
143:418 144:484 145:54 146:450 147:225 148:663
149:247 150:164 151:189 152:330 153:180 154:4
155:400 156:196 157:352 158:137 159:454 160:312
161:208 162:309 163:165 164:503 165:378 166:529
167:430 168:741 169:157 170:847 171:78 172:1
173:1657 174:614 175:380 176:142 177:163 178:1002
180:882 181:22 182:492 183:219 184:408 185:1
186:1272 187:711 188:884 189:938 190:4944 192:5926
193:5000 194:3560 195:3165 196:1251 197:41 198:3587
199:3967 200:5544 201:1500 202:8394 203:8426 204:4226
205:2347 206:2755 207:2818 208:3976 209:3467 210:2700
211:1463 212:2144 213:1767 214:770 215:69 216:4954
217:1659 218:547 219:362 220:1206 221:494 222:361
223:182

End of report
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