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.

Friday, January 28, 2011

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sat 29 Jan, 2011

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

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

BGP routing table entries examined: 336021
Prefixes after maximum aggregation: 153900
Deaggregation factor: 2.18
Unique aggregates announced to Internet: 169185
Total ASes present in the Internet Routing Table: 35549
Prefixes per ASN: 9.45
Origin-only ASes present in the Internet Routing Table: 30755
Origin ASes announcing only one prefix: 14947
Transit ASes present in the Internet Routing Table: 4794
Transit-only ASes present in the Internet Routing Table: 107
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 25
Max AS path prepend of ASN (22394) 20
Prefixes from unregistered ASNs in the Routing Table: 317
Unregistered ASNs in the Routing Table: 123
Number of 32-bit ASNs allocated by the RIRs: 1051
Prefixes from 32-bit ASNs in the Routing Table: 1606
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 212
Number of addresses announced to Internet: 2483561216
Equivalent to 148 /8s, 8 /16s and 35 /24s
Percentage of available address space announced: 67.0
Percentage of allocated address space announced: 69.2
Percentage of available address space allocated: 96.8
Percentage of address space in use by end-sites: 88.0
Total number of prefixes smaller than registry allocations: 136318

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

Prefixes being announced by APNIC Region ASes: 81578
Total APNIC prefixes after maximum aggregation: 27783
APNIC Deaggregation factor: 2.94
Prefixes being announced from the APNIC address blocks: 79189
Unique aggregates announced from the APNIC address blocks: 35491
APNIC Region origin ASes present in the Internet Routing Table: 4259
APNIC Prefixes per ASN: 18.59
APNIC Region origin ASes announcing only one prefix: 1226
APNIC Region transit ASes present in the Internet Routing Table: 656
Average APNIC Region AS path length visible: 4.1
Max APNIC Region AS path length visible: 21
Number of APNIC addresses announced to Internet: 586249728
Equivalent to 34 /8s, 241 /16s and 118 /24s
Percentage of available APNIC address space announced: 79.4

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, 42/8, 43/8, 49/8,
58/8, 59/8, 60/8, 61/8, 101/8, 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: 135176
Total ARIN prefixes after maximum aggregation: 69298
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 108091
Unique aggregates announced from the ARIN address blocks: 44485
ARIN Region origin ASes present in the Internet Routing Table: 14066
ARIN Prefixes per ASN: 7.68
ARIN Region origin ASes announcing only one prefix: 5380
ARIN Region transit ASes present in the Internet Routing Table: 1388
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 23
Number of ARIN addresses announced to Internet: 751503616
Equivalent to 44 /8s, 203 /16s and 9 /24s
Percentage of available ARIN address space announced: 63.1

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, 47/8, 48/8, 50/8, 52/8, 54/8,
55/8, 56/8, 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,
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: 81217
Total RIPE prefixes after maximum aggregation: 46127
RIPE Deaggregation factor: 1.76
Prefixes being announced from the RIPE address blocks: 74574
Unique aggregates announced from the RIPE address blocks: 48365
RIPE Region origin ASes present in the Internet Routing Table: 15238
RIPE Prefixes per ASN: 4.89
RIPE Region origin ASes announcing only one prefix: 7778
RIPE Region transit ASes present in the Internet Routing Table: 2357
Average RIPE Region AS path length visible: 3.4
Max RIPE Region AS path length visible: 25
Number of RIPE addresses announced to Internet: 456931072
Equivalent to 27 /8s, 60 /16s and 55 /24s
Percentage of available RIPE address space announced: 75.7

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, 193/8, 194/8, 195/8, 212/8, 213/8,
217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 31085
Total LACNIC prefixes after maximum aggregation: 7160
LACNIC Deaggregation factor: 4.34
Prefixes being announced from the LACNIC address blocks: 30015
Unique aggregates announced from the LACNIC address blocks: 15792
LACNIC Region origin ASes present in the Internet Routing Table: 1414
LACNIC Prefixes per ASN: 21.23
LACNIC Region origin ASes announcing only one prefix: 438
LACNIC Region transit ASes present in the Internet Routing Table: 239
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 18
Number of LACNIC addresses announced to Internet: 80139520
Equivalent to 4 /8s, 198 /16s and 213 /24s
Percentage of available LACNIC address space announced: 59.7

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 plus ERX transfers
LACNIC Address Blocks 177/8, 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: 4675
Total AfriNIC prefixes after maximum aggregation: 1648
AfriNIC Deaggregation factor: 2.84
Prefixes being announced from the AfriNIC address blocks: 3479
Unique aggregates announced from the AfriNIC address blocks: 1563
AfriNIC Region origin ASes present in the Internet Routing Table: 403
AfriNIC Prefixes per ASN: 8.63
AfriNIC Region origin ASes announcing only one prefix: 125
AfriNIC Region transit ASes present in the Internet Routing Table: 90
Average AfriNIC Region AS path length visible: 3.5
Max AfriNIC Region AS path length visible: 17
Number of AfriNIC addresses announced to Internet: 18311680
Equivalent to 1 /8s, 23 /16s and 106 /24s
Percentage of available AfriNIC address space announced: 36.4

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 105/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 1760 9484 516 Korea Telecom (KIX)
7545 1580 299 80 TPG Internet Pty Ltd
4755 1402 636 160 TATA Communications formerly
17974 1394 459 28 PT TELEKOMUNIKASI INDONESIA
24560 1094 317 180 Bharti Airtel Ltd., Telemedia
9583 1044 76 487 Sify Limited
17488 950 162 103 Hathway IP Over Cable Interne
4808 930 2012 266 CNCGROUP IP network: China169
18101 922 116 140 Reliance Infocom Ltd Internet
9829 887 758 52 BSNL National Internet Backbo

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

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

ASN No of nets /20 equiv MaxAgg Description
6389 3711 3855 266 bellsouth.net, inc.
4323 2634 1125 405 Time Warner Telecom
19262 1841 4943 285 Verizon Global Networks
1785 1790 698 133 PaeTec Communications, Inc.
20115 1521 1531 642 Charter Communications
6478 1476 291 56 AT&T Worldnet Services
7018 1374 6708 893 AT&T WorldNet Services
2386 1295 554 934 AT&T Data Communications Serv
22773 1273 2864 77 Cox Communications, Inc.
11492 1269 235 74 Cable One

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

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

ASN No of nets /20 equiv MaxAgg Description
6830 510 1764 317 UPC Distribution Services
9116 481 328 31 Goldenlines main autonomous s
9198 465 266 14 Kazakhtelecom Data Network Ad
34984 458 97 137 BILISIM TELEKOM
3292 447 2011 390 TDC Tele Danmark
8866 438 133 23 Bulgarian Telecommunication C
12479 412 577 6 Uni2 Autonomous System
8551 404 355 38 Bezeq International
702 401 1819 314 UUNET - Commercial IP service
3320 401 7616 350 Deutsche Telekom AG

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

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

ASN No of nets /20 equiv MaxAgg Description
10620 1357 252 165 TVCABLE BOGOTA
28573 1224 961 82 NET Servicos de Comunicao S.A
8151 1197 2608 352 UniNet S.A. de C.V.
6503 1139 355 79 AVANTEL, S.A.
7303 864 460 103 Telecom Argentina Stet-France
14420 614 55 90 ANDINATEL S.A.
22047 566 310 15 VTR PUNTO NET S.A.
3816 500 220 95 Empresa Nacional de Telecomun
7738 478 922 30 Telecomunicacoes da Bahia S.A
14117 456 34 31 Telefonica del Sur S.A.

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

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

ASN No of nets /20 equiv MaxAgg Description
3741 264 987 226 The Internet Solution
6713 203 199 12 Itissalat Al-MAGHRIB
33776 194 12 15 Starcomms Nigeria Limited
29571 193 17 11 Ci Telecom Autonomous system
16637 163 440 89 MTN Network Solutions
36874 139 24 6 Cybersmart
29975 131 475 17 Vodacom
37061 108 9 2 One Communications Ltd
15706 106 16 5 Sudatel Internet Exchange Aut
37054 85 5 21 Data Telecom Service

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

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

ASN No of nets /20 equiv MaxAgg Description
6389 3711 3855 266 bellsouth.net, inc.
4323 2634 1125 405 Time Warner Telecom
19262 1841 4943 285 Verizon Global Networks
1785 1790 698 133 PaeTec Communications, Inc.
4766 1760 9484 516 Korea Telecom (KIX)
23456 1606 395 886 32-bit ASN transition
7545 1580 299 80 TPG Internet Pty Ltd
20115 1521 1531 642 Charter Communications
6478 1476 291 56 AT&T Worldnet Services
4755 1402 636 160 TATA Communications formerly

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

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

ASN No of nets Net Savings Description
4323 2634 2229 Time Warner Telecom
1785 1790 1657 PaeTec Communications, Inc.
19262 1841 1556 Verizon Global Networks
7545 1580 1500 TPG Internet Pty Ltd
6478 1476 1420 AT&T Worldnet Services
17974 1394 1366 PT TELEKOMUNIKASI INDONESIA
4766 1760 1244 Korea Telecom (KIX)
4755 1402 1242 TATA Communications formerly
22773 1273 1196 Cox Communications, Inc.
11492 1269 1195 Cable One

Complete listing at http://thyme.rand.apnic.net/london/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
65333 PRIVATE 10.0.0.0/8 0 *
16927 UNALLOCATED 12.0.252.0/23 7018 AT&T WorldNet Servic
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

Complete listing at http://thyme.rand.apnic.net/london/data-badAS

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

Prefix Origin AS Description
10.0.0.0/8 65333 Internet Assigned Numbers Aut
169.254.0.0/16 65333 Internet Assigned Numbers Aut
172.16.0.0/12 65333 Internet Assigned Numbers Aut
192.0.2.0/24 65333 Internet Assigned Numbers Aut
192.168.0.0/16 0 *
198.18.0.0/15 65333 Internet Assigned Numbers Aut

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

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

Network Origin AS Description
5.0.0.0/16 12654 RIPE NCC RIS Project
5.1.0.0/21 12654 RIPE NCC RIS Project
5.1.24.0/24 12654 RIPE NCC RIS Project
24.129.192.0/19 7922 Continental Cablevision
37.0.0.0/16 12654 RIPE NCC RIS Project
37.1.0.0/21 12654 RIPE NCC RIS Project
37.1.24.0/24 12654 RIPE NCC RIS Project
41.57.192.0/18 22750 BCSNET
41.78.192.0/22 30999 Emtel is GSM, 3G and ISP in M
41.222.79.0/24 36938 >>UNKNOWN<<

Complete listing at http://thyme.rand.apnic.net/london/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 /8:27 /9:10 /10:26 /11:71 /12:215
/13:439 /14:764 /15:1358 /16:11424 /17:5557 /18:9197
/19:18827 /20:24203 /21:24402 /22:32181 /23:30790 /24:176079
/25:11 /26:17 /27:24 /28:151 /29:93 /30:44
/31:0 /32:111

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

ASN No of nets Total ann. Description
6389 2289 3711 bellsouth.net, inc.
6478 1430 1476 AT&T Worldnet Services
4323 1421 2634 Time Warner Telecom
10620 1248 1357 TVCABLE BOGOTA
11492 1225 1269 Cable One
18566 1103 1122 Covad Communications
7011 1065 1168 Citizens Utilities
1785 1059 1790 PaeTec Communications, Inc.
19262 954 1841 Verizon Global Networks
23456 952 1606 32-bit ASN transition

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

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

1:167 2:29 4:13 5:1 8:331 12:2028
13:1 14:360 15:15 16:3 17:8 20:9
23:1 24:1466 27:546 32:57 33:5 34:2
36:1 37:1 38:688 40:101 41:1616 42:1
44:3 46:515 47:5 49:143 50:74 52:12
55:6 56:2 57:27 58:766 59:481 60:389
61:1021 62:781 63:1918 64:3732 65:2329 66:4057
67:1753 68:1004 69:2871 70:716 71:392 72:1988
73:1 74:2310 75:293 76:330 77:851 78:689
79:436 80:1018 81:765 82:511 83:473 84:456
85:1046 86:512 87:740 88:359 89:1582 90:159
91:3429 92:493 93:1043 94:1159 95:780 96:417
97:249 98:756 99:33 101:24 107:3 108:81
109:855 110:470 111:686 112:305 113:350 114:475
115:627 116:870 117:666 118:639 119:1018 120:239
121:680 122:1604 123:1051 124:1251 125:1212 128:195
129:152 130:168 131:564 132:103 133:20 134:210
135:49 136:213 137:144 138:293 139:118 140:467
141:198 142:343 143:371 144:480 145:51 146:418
147:192 148:610 149:272 150:150 151:230 152:300
153:175 154:2 155:346 156:171 157:312 158:128
159:368 160:313 161:195 162:276 163:107 164:484
165:334 166:481 167:422 168:732 169:147 170:741
171:66 172:1 173:1265 174:515 175:301 176:1
177:4 178:762 180:757 182:387 183:251 184:207
186:963 187:794 188:908 189:1022 190:4398 192:5728
193:4778 194:3457 195:2915 196:1029 197:3 198:3471
199:3716 200:5549 201:1581 202:8040 203:8332 204:4019
205:2314 206:2435 207:2890 208:3877 209:3463 210:2578
211:1322 212:1865 213:1616 214:751 215:62 216:4803
217:1489 218:514 219:372 220:1194 221:432 222:316
223:90

End of report
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