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.

Tuesday, December 14, 2010

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 15 Dec, 2010

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

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

BGP routing table entries examined: 333734
Prefixes after maximum aggregation: 151871
Deaggregation factor: 2.20
Unique aggregates announced to Internet: 166501
Total ASes present in the Internet Routing Table: 35312
Prefixes per ASN: 9.45
Origin-only ASes present in the Internet Routing Table: 30522
Origin ASes announcing only one prefix: 14921
Transit ASes present in the Internet Routing Table: 4790
Transit-only ASes present in the Internet Routing Table: 105
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 26
Max AS path prepend of ASN (41664) 21
Prefixes from unregistered ASNs in the Routing Table: 300
Unregistered ASNs in the Routing Table: 117
Number of 32-bit ASNs allocated by the RIRs: 948
Prefixes from 32-bit ASNs in the Routing Table: 1438
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 189
Number of addresses announced to Internet: 2474010624
Equivalent to 147 /8s, 118 /16s and 104 /24s
Percentage of available address space announced: 66.7
Percentage of allocated address space announced: 68.9
Percentage of available address space allocated: 96.8
Percentage of address space in use by end-sites: 86.7
Total number of prefixes smaller than registry allocations: 136030

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

Prefixes being announced by APNIC Region ASes: 79840
Total APNIC prefixes after maximum aggregation: 27292
APNIC Deaggregation factor: 2.93
Prefixes being announced from the APNIC address blocks: 77564
Unique aggregates announced from the APNIC address blocks: 34902
APNIC Region origin ASes present in the Internet Routing Table: 4212
APNIC Prefixes per ASN: 18.42
APNIC Region origin ASes announcing only one prefix: 1210
APNIC Region transit ASes present in the Internet Routing Table: 643
Average APNIC Region AS path length visible: 4.1
Max APNIC Region AS path length visible: 21
Number of APNIC addresses announced to Internet: 574537728
Equivalent to 34 /8s, 62 /16s and 192 /24s
Percentage of available APNIC address space announced: 77.8

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, 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: 134075
Total ARIN prefixes after maximum aggregation: 68512
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 106903
Unique aggregates announced from the ARIN address blocks: 43932
ARIN Region origin ASes present in the Internet Routing Table: 13982
ARIN Prefixes per ASN: 7.65
ARIN Region origin ASes announcing only one prefix: 5366
ARIN Region transit ASes present in the Internet Routing Table: 1401
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 22
Number of ARIN addresses announced to Internet: 743541760
Equivalent to 44 /8s, 81 /16s and 140 /24s
Percentage of available ARIN address space announced: 62.4

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,
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: 79529
Total RIPE prefixes after maximum aggregation: 45392
RIPE Deaggregation factor: 1.75
Prefixes being announced from the RIPE address blocks: 73023
Unique aggregates announced from the RIPE address blocks: 47228
RIPE Region origin ASes present in the Internet Routing Table: 15132
RIPE Prefixes per ASN: 4.83
RIPE Region origin ASes announcing only one prefix: 7767
RIPE Region transit ASes present in the Internet Routing Table: 2343
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 26
Number of RIPE addresses announced to Internet: 450883328
Equivalent to 26 /8s, 223 /16s and 239 /24s
Percentage of available RIPE address space announced: 74.7

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, 196608-197631
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: 30553
Total LACNIC prefixes after maximum aggregation: 7055
LACNIC Deaggregation factor: 4.33
Prefixes being announced from the LACNIC address blocks: 29434
Unique aggregates announced from the LACNIC address blocks: 15438
LACNIC Region origin ASes present in the Internet Routing Table: 1394
LACNIC Prefixes per ASN: 21.11
LACNIC Region origin ASes announcing only one prefix: 441
LACNIC Region transit ASes present in the Internet Routing Table: 241
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 19
Number of LACNIC addresses announced to Internet: 78591488
Equivalent to 4 /8s, 175 /16s and 54 /24s
Percentage of available LACNIC address space announced: 58.6

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: 7621
Total AfriNIC prefixes after maximum aggregation: 1918
AfriNIC Deaggregation factor: 3.97
Prefixes being announced from the AfriNIC address blocks: 5921
Unique aggregates announced from the AfriNIC address blocks: 1756
AfriNIC Region origin ASes present in the Internet Routing Table: 425
AfriNIC Prefixes per ASN: 13.93
AfriNIC Region origin ASes announcing only one prefix: 137
AfriNIC Region transit ASes present in the Internet Routing Table: 94
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 17
Number of AfriNIC addresses announced to Internet: 21597952
Equivalent to 1 /8s, 73 /16s and 143 /24s
Percentage of available AfriNIC address space announced: 42.9

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 1726 9453 516 Korea Telecom (KIX)
7545 1535 298 74 TPG Internet Pty Ltd
4755 1383 633 153 TATA Communications formerly
17974 1327 459 27 PT TELEKOMUNIKASI INDONESIA
24560 1040 312 174 Bharti Airtel Ltd., Telemedia
9583 1039 76 487 Sify Limited
17488 955 157 111 Hathway IP Over Cable Interne
18101 905 116 135 Reliance Infocom Ltd Internet
4808 898 1623 253 CNCGROUP IP network: China169
9829 824 696 31 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 3735 3871 269 bellsouth.net, inc.
4323 2627 1093 399 Time Warner Telecom
19262 1833 4853 281 Verizon Global Networks
1785 1789 697 132 PaeTec Communications, Inc.
20115 1514 1531 640 Charter Communications
6478 1432 290 56 AT&T Worldnet Services
7018 1378 5687 890 AT&T WorldNet Services
2386 1309 571 926 AT&T Data Communications Serv
22773 1258 2863 73 Cox Communications, Inc.
11492 1246 233 75 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
9116 540 328 32 Goldenlines main autonomous s
6830 501 1763 309 UPC Distribution Services
3292 444 2010 386 TDC Tele Danmark
8866 434 133 23 Bulgarian Telecommunication C
9121 434 1690 28 TTnet Autonomous System
34984 422 92 191 BILISIM TELEKOM
9198 416 202 13 Kazakhtelecom Data Network Ad
702 404 1867 318 UUNET - Commercial IP service
8551 404 355 38 Bezeq International
12479 396 577 6 Uni2 Autonomous System

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 1343 250 154 TVCABLE BOGOTA
8151 1219 2599 362 UniNet S.A. de C.V.
28573 1207 933 79 NET Servicos de Comunicao S.A
6503 1165 355 81 AVANTEL, S.A.
7303 805 440 94 Telecom Argentina Stet-France
14420 584 49 88 ANDINATEL S.A.
22047 564 310 15 VTR PUNTO NET S.A.
3816 493 216 102 Empresa Nacional de Telecomun
7738 478 922 30 Telecomunicacoes da Bahia S.A
14117 452 32 30 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
8452 1085 445 10 TEDATA
24863 743 147 37 LINKdotNET AS number
36992 652 275 154 Etisalat MISR
3741 263 986 225 The Internet Solution
24835 212 78 10 RAYA Telecom - Egypt
6713 203 199 12 Itissalat Al-MAGHRIB
29571 199 19 11 Ci Telecom Autonomous system
2018 196 277 64 Tertiary Education Network
33776 184 12 14 Starcomms Nigeria Limited
16637 162 440 89 MTN Network Solutions

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 3735 3871 269 bellsouth.net, inc.
4323 2627 1093 399 Time Warner Telecom
19262 1833 4853 281 Verizon Global Networks
1785 1789 697 132 PaeTec Communications, Inc.
4766 1726 9453 516 Korea Telecom (KIX)
7545 1535 298 74 TPG Internet Pty Ltd
20115 1514 1531 640 Charter Communications
23456 1438 365 795 32-bit ASN transition
6478 1432 290 56 AT&T Worldnet Services
4755 1383 633 153 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 2627 2228 Time Warner Telecom
1785 1789 1657 PaeTec Communications, Inc.
19262 1833 1552 Verizon Global Networks
7545 1535 1461 TPG Internet Pty Ltd
6478 1432 1376 AT&T Worldnet Services
17974 1327 1300 PT TELEKOMUNIKASI INDONESIA
4755 1383 1230 TATA Communications formerly
4766 1726 1210 Korea Telecom (KIX)
10620 1343 1189 TVCABLE BOGOTA
22773 1258 1185 Cox Communications, Inc.

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
41.222.79.0/24 36938 >>UNKNOWN<<
41.223.92.0/22 36936 >>UNKNOWN<<
46.39.96.0/19 50821 High Performance Data Center

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 /8:28 /9:10 /10:25 /11:70 /12:213
/13:429 /14:751 /15:1341 /16:11366 /17:5496 /18:9170
/19:18690 /20:23953 /21:24125 /22:31651 /23:30632 /24:175337
/25:11 /26:17 /27:27 /28:153 /29:95 /30:39
/31:0 /32:105

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

ASN No of nets Total ann. Description
6389 2306 3735 bellsouth.net, inc.
4323 1418 2627 Time Warner Telecom
6478 1389 1432 AT&T Worldnet Services
10620 1235 1343 TVCABLE BOGOTA
11492 1203 1246 Cable One
7011 1069 1172 Citizens Utilities
1785 1059 1789 PaeTec Communications, Inc.
18566 1043 1062 Covad Communications
8452 977 1085 TEDATA
19262 955 1833 Verizon Global Networks

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

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

1:132 2:15 4:13 5:1 8:315 12:2032
13:6 14:72 15:17 16:3 17:8 20:9
24:1424 27:483 32:58 33:5 34:2 36:1
37:1 38:714 40:101 41:2632 42:1 44:3
46:398 47:4 49:41 50:18 52:12 55:5
56:2 57:28 58:760 59:498 60:394 61:1000
62:1024 63:1926 64:3689 65:2316 66:4059 67:1758
68:1004 69:2814 70:712 71:389 72:1947 74:2279
75:288 76:319 77:848 78:746 79:435 80:1052
81:798 82:515 83:446 84:632 85:1044 86:496
87:700 88:402 89:1592 90:146 91:3329 92:460
93:1026 94:1129 95:694 96:402 97:246 98:699
99:33 101:3 107:2 108:77 109:793 110:469
111:659 112:302 113:317 114:462 115:641 116:880
117:645 118:585 119:1003 120:196 121:693 122:1569
123:1022 124:1218 125:1171 128:180 129:147 130:163
131:561 132:227 133:20 134:198 135:50 136:210
137:145 138:289 139:107 140:457 141:196 142:336
143:518 144:479 145:54 146:417 147:174 148:619
149:327 150:150 151:230 152:293 153:172 154:2
155:369 156:163 157:310 158:126 159:369 160:314
161:188 162:275 163:155 164:434 165:332 166:469
167:419 168:703 169:148 170:721 171:67 172:2
173:1135 174:471 175:259 176:1 178:636 180:720
182:510 183:241 184:189 186:826 187:771 188:878
189:1011 190:4252 192:5714 193:4781 194:3463 195:2878
196:1191 197:1 198:3467 199:3641 200:5506 201:1585
202:8008 203:8276 204:3975 205:2309 206:2428 207:2882
208:3850 209:3454 210:2507 211:1314 212:1887 213:1691
214:735 215:62 216:4759 217:1618 218:498 219:395
220:1176 221:399 222:313 223:80

End of report
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