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, May 24, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 25 May, 2012

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

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

BGP routing table entries examined: 404217
Prefixes after maximum aggregation: 172101
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 200069
Total ASes present in the Internet Routing Table: 38568
Prefixes per ASN: 10.48
Origin-only ASes present in the Internet Routing Table: 33272
Origin ASes announcing only one prefix: 15695
Transit ASes present in the Internet Routing Table: 5296
Transit-only ASes present in the Internet Routing Table: 114
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 27
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 1159
Unregistered ASNs in the Routing Table: 226
Number of 32-bit ASNs allocated by the RIRs: 2691
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6025
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 254
Number of addresses announced to Internet: 2573574912
Equivalent to 153 /8s, 101 /16s and 163 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.5
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.6
Total number of prefixes smaller than registry allocations: 170683

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

Prefixes being announced by APNIC Region ASes: 94763
Total APNIC prefixes after maximum aggregation: 30968
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 92269
Unique aggregates announced from the APNIC address blocks: 40105
APNIC Region origin ASes present in the Internet Routing Table: 4651
APNIC Prefixes per ASN: 19.84
APNIC Region origin ASes announcing only one prefix: 1268
APNIC Region transit ASes present in the Internet Routing Table: 706
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 645387520
Equivalent to 38 /8s, 119 /16s and 213 /24s
Percentage of available APNIC address space announced: 81.8

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 132096-133119
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: 150177
Total ARIN prefixes after maximum aggregation: 76362
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120843
Unique aggregates announced from the ARIN address blocks: 51014
ARIN Region origin ASes present in the Internet Routing Table: 15073
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5744
ARIN Region transit ASes present in the Internet Routing Table: 1516
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 16
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 812258816
Equivalent to 48 /8s, 106 /16s and 22 /24s
Percentage of available ARIN address space announced: 64.8

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: 102259
Total RIPE prefixes after maximum aggregation: 54394
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94286
Unique aggregates announced from the RIPE address blocks: 59055
RIPE Region origin ASes present in the Internet Routing Table: 16567
RIPE Prefixes per ASN: 5.69
RIPE Region origin ASes announcing only one prefix: 8065
RIPE Region transit ASes present in the Internet Routing Table: 2597
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 27
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 513357824
Equivalent to 30 /8s, 153 /16s and 56 /24s
Percentage of available RIPE address space announced: 82.7

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, 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: 40871
Total LACNIC prefixes after maximum aggregation: 8147
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 41155
Unique aggregates announced from the LACNIC address blocks: 20477
LACNIC Region origin ASes present in the Internet Routing Table: 1586
LACNIC Prefixes per ASN: 25.95
LACNIC Region origin ASes announcing only one prefix: 448
LACNIC Region transit ASes present in the Internet Routing Table: 297
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 101335552
Equivalent to 6 /8s, 10 /16s and 66 /24s
Percentage of available LACNIC address space announced: 67.1

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: 9292
Total AfriNIC prefixes after maximum aggregation: 2166
AfriNIC Deaggregation factor: 4.29
Prefixes being announced from the AfriNIC address blocks: 7362
Unique aggregates announced from the AfriNIC address blocks: 2199
AfriNIC Region origin ASes present in the Internet Routing Table: 541
AfriNIC Prefixes per ASN: 13.61
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 119
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 0
Number of AfriNIC addresses announced to Internet: 31732480
Equivalent to 1 /8s, 228 /16s and 51 /24s
Percentage of available AfriNIC address space announced: 47.3

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 1982 11105 733 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1665 301 87 TPG Internet Pty Ltd
4755 1553 384 152 TATA Communications formerly
9829 1298 1085 28 National Internet Backbone
9583 1161 87 499 Sify Limited
7552 1129 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 64 BHARTI Airtel Ltd.
18101 949 131 156 Reliance Infocom Ltd Internet

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 3414 3807 194 BellSouth.net Inc.
7029 3372 1016 171 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
1785 1907 680 130 PaeTec Communications, Inc.
20115 1638 1565 617 Charter Communications
22773 1607 2911 121 Cox Communications Inc.
4323 1561 1056 378 tw telecom holdings, inc.
30036 1408 261 752 Mediacom Communications Corp
7018 1230 10063 827 AT&T Services, Inc.
7011 1188 317 681 Frontier Communications of Am

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
8402 1651 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 697 188 172 BILISIM TELEKOM
12479 686 677 71 France Telecom Espana SA
31148 684 37 9 FreeNet ISP
6830 654 2215 425 UPC Broadband
20940 642 215 510 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 492 360 80 Bezeq International
3320 486 8442 402 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 1917 340 202 Types of queries are: POCs, o
28573 1878 1171 59 Types of queries are: POCs, o
6503 1531 418 68 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1335 3027 330 Uninet S.A. de C.V.
26615 902 760 32 Tim Celular S.A.
27947 665 73 95 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
3816 582 245 99 Types of queries are: POCs, o
22047 582 326 15 Types of queries are: POCs, o

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
8452 1368 957 12 TEDATA
24863 843 274 32 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 192 12 21 Starcomms Nigeria Limited
15706 164 32 6 Sudatel Internet Exchange Aut
16637 162 666 87 MTN Network Solutions
29571 157 15 16 Ci Telecom Autonomous system

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 3414 3807 194 BellSouth.net Inc.
7029 3372 1016 171 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
4766 1982 11105 733 Korea Telecom (KIX)
10620 1917 340 202 Types of queries are: POCs, o
1785 1907 680 130 PaeTec Communications, Inc.
28573 1878 1171 59 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1665 301 87 TPG Internet Pty Ltd
8402 1651 544 16 Corbina telecom

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

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

ASN No of nets Net Savings Description
7029 3372 3201 Windstream Communications Inc
18566 2096 1918 Covad Communications Co.
28573 1878 1819 Types of queries are: POCs, o
1785 1907 1777 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1917 1715 Types of queries are: POCs, o
8402 1651 1635 Corbina telecom
7545 1665 1578 TPG Internet Pty Ltd
22773 1607 1486 Cox Communications Inc.
6503 1531 1463 Axtel, S.A.B. de C.V.

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 *
32805 UNALLOCATED 12.1.225.0/24 7018 AT&T Services, Inc.
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T Services, Inc.
16504 UNALLOCATED 12.18.155.0/24 30170 Optic Fusion
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T Services, Inc.
26095 UNALLOCATED 12.34.8.0/24 7018 AT&T Services, Inc.
21861 UNALLOCATED 12.37.59.0/24 7018 AT&T Services, Inc.
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T Services, Inc.
19577 UNALLOCATED 12.41.188.0/24 7832 WW/Precision Communi
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T Services, Inc.

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
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project
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
5.23.0.0/19 6453 Teleglobe Inc.
5.23.32.0/24 20836 CDLAN Autonomous System
5.23.40.0/21 13193 Nerim -- xDSL Internet Provid
5.23.64.0/19 44432 Backbone ehf
5.23.96.0/21 8636 Autonomous System for
5.23.112.0/22 48944 Khalij Ettela Resan Jonoub LT
5.23.112.0/21 48944 Khalij Ettela Resan Jonoub LT
5.23.116.0/22 48944 Khalij Ettela Resan Jonoub LT
5.23.120.0/21 8678 Ankara Universitesi Rektorlug
5.28.0.0/21 12303 CADRUS AUTONOMOUS SYSTEM

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 /8:20 /9:12 /10:30 /11:81 /12:236
/13:460 /14:830 /15:1499 /16:12241 /17:6263 /18:10502
/19:20646 /20:29319 /21:30481 /22:39690 /23:38039 /24:213300
/25:11 /26:21 /27:19 /28:151 /29:149 /30:77
/31:0 /32:140

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

ASN No of nets Total ann. Description
7029 3013 3372 Windstream Communications Inc
6389 2132 3414 BellSouth.net Inc.
18566 2045 2096 Covad Communications Co.
10620 1734 1917 Types of queries are: POCs, o
8402 1629 1651 Corbina telecom
30036 1349 1408 Mediacom Communications Corp
6503 1283 1531 Axtel, S.A.B. de C.V.
8452 1170 1368 TEDATA
11492 1149 1186 CABLE ONE, INC.
7011 1073 1188 Frontier Communications of Am

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

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

1:545 2:705 4:13 5:35 6:3 8:419
12:1972 13:1 14:612 15:12 16:3 17:5
20:23 23:169 24:1766 27:1308 31:1040 32:52
33:2 34:2 36:8 37:623 38:803 40:119
41:3186 42:137 44:3 46:1415 47:3 49:446
50:543 52:13 54:11 55:11 56:3 57:27
58:914 59:479 60:247 61:1124 62:974 63:2031
64:4227 65:2245 66:4470 67:2015 68:1160 69:3192
70:932 71:494 72:1824 74:2599 75:492 76:328
77:945 78:982 79:489 80:1220 81:927 82:668
83:542 84:489 85:1209 86:446 87:910 88:340
89:1712 90:289 91:4847 92:548 93:1347 94:1516
95:1145 96:363 97:313 98:866 99:35 100:7
101:190 103:1081 106:104 107:185 108:289 109:1341
110:753 111:917 112:398 113:584 114:619 115:830
116:916 117:705 118:908 119:1197 120:349 121:676
122:1624 123:1100 124:1316 125:1251 128:519 129:189
130:245 131:626 132:281 133:22 134:238 135:62
136:213 137:237 138:359 139:181 140:468 141:242
142:398 143:547 144:532 145:70 146:500 147:285
148:753 149:297 150:188 151:177 152:466 153:172
154:11 155:418 156:220 157:337 158:186 159:482
160:339 161:241 162:344 163:180 164:599 165:400
166:592 167:466 168:858 169:125 170:869 171:131
172:4 173:1750 174:592 175:423 176:587 177:797
178:1376 180:1205 181:85 182:983 183:309 184:496
185:1 186:2292 187:1090 188:1277 189:1784 190:5514
192:5966 193:5554 194:4521 195:3413 196:1187 197:148
198:3613 199:4605 200:5730 201:1935 202:8331 203:8510
204:4258 205:2530 206:2675 207:2731 208:4056 209:3606
210:2688 211:1514 212:2032 213:1944 214:863 215:93
216:5081 217:1551 218:536 219:307 220:1231 221:545
222:296 223:347

End of report
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