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.

Sunday, February 6, 2011

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 07 Feb, 2011

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

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

BGP routing table entries examined: 69543
Prefixes after maximum aggregation: 35948
Deaggregation factor: 1.93
Unique aggregates announced to Internet: 45000
Total ASes present in the Internet Routing Table: 11069
Prefixes per ASN: 6.28
Origin-only ASes present in the Internet Routing Table: 9168
Origin ASes announcing only one prefix: 5241
Transit ASes present in the Internet Routing Table: 1901
Transit-only ASes present in the Internet Routing Table: 141
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 25
Max AS path prepend of ASN (43120) 18
Prefixes from unregistered ASNs in the Routing Table: 62
Unregistered ASNs in the Routing Table: 23
Number of 32-bit ASNs allocated by the RIRs: 1092
Prefixes from 32-bit ASNs in the Routing Table: 569
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 26
Number of addresses announced to Internet: 352007427
Equivalent to 20 /8s, 251 /16s and 53 /24s
Percentage of available address space announced: 9.5
Percentage of allocated address space announced: 9.5
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 88.2
Total number of prefixes smaller than registry allocations: 25312

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

Prefixes being announced by APNIC Region ASes: 22920
Total APNIC prefixes after maximum aggregation: 9295
APNIC Deaggregation factor: 2.47
Prefixes being announced from the APNIC address blocks: 22789
Unique aggregates announced from the APNIC address blocks: 12586
APNIC Region origin ASes present in the Internet Routing Table: 1823
APNIC Prefixes per ASN: 12.50
APNIC Region origin ASes announcing only one prefix: 593
APNIC Region transit ASes present in the Internet Routing Table: 331
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 21
Number of APNIC addresses announced to Internet: 140825602
Equivalent to 8 /8s, 100 /16s and 212 /24s
Percentage of available APNIC address space announced: 17.9

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: 8139
Total ARIN prefixes after maximum aggregation: 4670
ARIN Deaggregation factor: 1.74
Prefixes being announced from the ARIN address blocks: 7107
Unique aggregates announced from the ARIN address blocks: 4559
ARIN Region origin ASes present in the Internet Routing Table: 1226
ARIN Prefixes per ASN: 5.80
ARIN Region origin ASes announcing only one prefix: 560
ARIN Region transit ASes present in the Internet Routing Table: 190
Average ARIN Region AS path length visible: 2.9
Max ARIN Region AS path length visible: 19
Number of ARIN addresses announced to Internet: 29048577
Equivalent to 1 /8s, 187 /16s and 63 /24s
Percentage of available ARIN address space announced: 2.4

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,
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: 35145
Total RIPE prefixes after maximum aggregation: 20070
RIPE Deaggregation factor: 1.75
Prefixes being announced from the RIPE address blocks: 33225
Unique aggregates announced from the RIPE address blocks: 23515
RIPE Region origin ASes present in the Internet Routing Table: 7649
RIPE Prefixes per ASN: 4.34
RIPE Region origin ASes announcing only one prefix: 4000
RIPE Region transit ASes present in the Internet Routing Table: 1277
Average RIPE Region AS path length visible: 3.2
Max RIPE Region AS path length visible: 25
Number of RIPE addresses announced to Internet: 108927744
Equivalent to 6 /8s, 126 /16s and 27 /24s
Percentage of available RIPE address space announced: 17.5

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: 294
Total LACNIC prefixes after maximum aggregation: 191
LACNIC Deaggregation factor: 1.54
Prefixes being announced from the LACNIC address blocks: 257
Unique aggregates announced from the LACNIC address blocks: 169
LACNIC Region origin ASes present in the Internet Routing Table: 48
LACNIC Prefixes per ASN: 5.35
LACNIC Region origin ASes announcing only one prefix: 20
LACNIC Region transit ASes present in the Internet Routing Table: 11
Average LACNIC Region AS path length visible: 5.0
Max LACNIC Region AS path length visible: 12
Number of LACNIC addresses announced to Internet: 1455104
Equivalent to 0 /8s, 22 /16s and 52 /24s
Percentage of available LACNIC address space announced: 1.0

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: 1986
Total AfriNIC prefixes after maximum aggregation: 989
AfriNIC Deaggregation factor: 2.01
Prefixes being announced from the AfriNIC address blocks: 1034
Unique aggregates announced from the AfriNIC address blocks: 689
AfriNIC Region origin ASes present in the Internet Routing Table: 177
AfriNIC Prefixes per ASN: 5.84
AfriNIC Region origin ASes announcing only one prefix: 68
AfriNIC Region transit ASes present in the Internet Routing Table: 30
Average AfriNIC Region AS path length visible: 2.6
Max AfriNIC Region AS path length visible: 13
Number of AfriNIC addresses announced to Internet: 7479040
Equivalent to 0 /8s, 114 /16s and 31 /24s
Percentage of available AfriNIC address space announced: 11.1

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
18101 926 117 142 Reliance Infocom Ltd Internet
17676 648 10843 70 Softbank BB Corp.
4780 645 461 75 Digital United Inc.
9498 638 241 53 BHARTI Airtel Ltd.
9583 626 46 425 Sify Limited
17803 561 177 140 BSES TeleCom Limited
7545 497 281 47 TPG Internet Pty Ltd
9304 282 366 29 Hutchison Telecom (HK)
17451 230 15 11 BIZNET ISP
18049 218 23 15 TAIWAN Network Information Ce

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
6517 334 50 256 Yipes Communications, Inc.
2711 320 122 31 Rock Hill Telephone Company
15105 269 32 12 Network Telephone Corporation
15003 209 38 87 TEGRIS Corporation
35908 202 112 13 VPLS Inc.
26640 198 12 95 Oso Grande Technologies, Inc.
25973 180 57 46 Mzima Networks, Inc.
33475 167 10 10 RockSolid Network, Inc.
18779 145 14 94 Guru.com
22646 139 14 30 Hargray Communications

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
9116 541 328 31 Goldenlines main autonomous s
9198 464 266 14 Kazakhtelecom Data Network Ad
8551 384 353 29 Bezeq International
30890 375 85 159 Evolva Telecom
29049 326 26 3 AzerSat LLC.
31148 325 17 93 FreeNet ISP
8708 240 486 215 Romania Data Systems S.A.
9050 228 378 180 RTD-ROMTELECOM Autonomous Sys
35002 214 50 99 HERTZA Computers
3303 201 434 179 Swisscom Ltd

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
1916 50 192 24 Fundacao de Amparo a Pesquisa
28571 43 62 41 Universidade de Sao Paulo - U
13878 26 9 8 Diginet
1251 18 84 18 Fundacao de Amparo a Pesquisa
2715 18 113 14 Fundacao de Amparo a Pesquisa
2716 16 27 8 Fundacao de Amparo a Pesquisa
19611 16 1 1 SAV - Unisinos
27924 9 1 1 Three Sixty Communications
27822 8 5 8 Emerging Markets Communicatio
10715 7 18 3 RCT-SC - Rede Catarinense de

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 262 987 226 The Internet Solution
24863 234 145 32 LINKdotNET AS number
16637 148 439 86 MTN Network Solutions
29975 132 490 17 Vodacom
2018 76 277 64 Tertiary Education Network
24835 76 31 15 RAYA Telecom - Egypt
12258 74 16 30 Vodacom Internet Company
5713 65 149 52 Telkom SA Ltd
8452 56 10 38 TEDATA
8094 50 16 3 PUKNET

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
18101 926 117 142 Reliance Infocom Ltd Internet
17676 648 10843 70 Softbank BB Corp.
4780 645 461 75 Digital United Inc.
9498 638 241 53 BHARTI Airtel Ltd.
9583 626 46 425 Sify Limited
23456 569 125 364 32-bit ASN transition
17803 561 177 140 BSES TeleCom Limited
9116 541 328 31 Goldenlines main autonomous s
7545 497 281 47 TPG Internet Pty Ltd
9198 464 266 14 Kazakhtelecom Data Network Ad

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

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

ASN No of nets Net Savings Description
9498 638 585 BHARTI Airtel Ltd.
17676 648 578 Softbank BB Corp.
4780 645 570 Digital United Inc.
9116 541 510 Goldenlines main autonomous s
7545 497 450 TPG Internet Pty Ltd
9198 464 450 Kazakhtelecom Data Network Ad
17803 561 421 BSES TeleCom Limited
8551 384 355 Bezeq International
29049 326 323 AzerSat LLC.
2711 320 289 Rock Hill Telephone Company

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 *
55636 UNALLOCATED 27.116.60.0/24 55554 True International G
55636 UNALLOCATED 27.116.61.0/24 45348 Regency Square, Comp
55636 UNALLOCATED 27.116.62.0/24 55554 True International G
55636 UNALLOCATED 27.116.63.0/24 55554 True International G
56326 UNALLOCATED 46.174.248.0/21 33871 Norilsk-Telecom Ltd.
38976 UNALLOCATED 62.192.224.0/19 20632 PETERSTAR Autonomous
38976 UNALLOCATED 62.192.230.0/24 20632 PETERSTAR Autonomous
38976 UNALLOCATED 62.192.231.0/24 20632 PETERSTAR Autonomous
38976 UNALLOCATED 62.192.232.0/24 20632 PETERSTAR Autonomous

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
66.206.47.0/24 17557 Pakistan Telecom
66.207.32.0/20 23011 >>UNKNOWN<<
121.54.161.0/24 38890 Internet Service Provider /ID
121.54.162.0/24 38890 Internet Service Provider /ID
190.102.32.0/20 30058 FDC Servers.net, LLC
202.58.113.0/24 19161 INNOCOM TELECOM
202.66.160.0/20 9584 Diyixian.com Limited
202.66.176.0/20 9584 Diyixian.com Limited
202.66.184.0/24 9584 Diyixian.com Limited
202.66.188.0/24 9584 Diyixian.com Limited

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 /8:3 /9:2 /10:7 /11:5 /12:17
/13:33 /14:94 /15:156 /16:2091 /17:1086 /18:1894
/19:4092 /20:5169 /21:5380 /22:7131 /23:6878 /24:35058
/25:11 /26:17 /27:24 /28:150 /29:94 /30:41
/31:0 /32:110

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

ASN No of nets Total ann. Description
23456 334 569 32-bit ASN transition
9198 328 464 Kazakhtelecom Data Network Ad
31148 325 325 FreeNet ISP
29049 322 326 AzerSat LLC.
6517 310 334 Yipes Communications, Inc.
30890 302 375 Evolva Telecom
15105 256 269 Network Telephone Corporation
15003 205 209 TEGRIS Corporation
9050 178 228 RTD-ROMTELECOM Autonomous Sys
35908 178 202 VPLS Inc.

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

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

1:37 2:30 4:2 8:17 12:12 13:1
14:32 20:2 24:13 27:218 38:50 41:334
44:1 46:264 49:47 58:218 59:100 60:114
61:334 62:291 63:38 64:326 65:101 66:283
67:174 68:122 69:265 70:77 71:3 72:176
74:148 75:4 76:60 77:435 78:216 79:201
80:467 81:412 82:209 83:211 84:208 85:635
86:266 87:451 88:155 89:978 90:54 91:1604
92:224 93:485 94:869 95:344 96:28 97:16
98:183 101:5 109:501 110:123 111:147 112:143
113:124 114:137 115:227 116:251 117:172 118:244
119:304 120:73 121:129 122:169 123:450 124:549
125:333 128:2 129:5 130:6 131:24 133:16
134:12 135:2 138:16 139:12 140:4 141:17
142:7 143:12 144:63 145:7 146:63 147:20
148:12 149:61 150:10 151:1 152:16 153:18
155:4 156:15 157:2 158:7 159:29 160:14
161:8 162:3 163:16 164:71 165:61 166:1
167:15 168:32 169:15 170:105 171:3 173:156
174:86 175:35 178:478 180:316 182:171 183:170
184:17 188:444 190:2 192:590 193:1675 194:1092
195:1142 196:509 198:217 199:271 200:82 201:3
202:2492 203:2318 204:264 205:68 206:273 207:348
208:273 209:252 210:599 211:179 212:669 213:580
216:482 217:579 218:81 219:29 220:531 221:111
222:20 223:21

End of report
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