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, April 26, 2011

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 27 Apr, 2011

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

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

BGP routing table entries examined: 350559
Prefixes after maximum aggregation: 158877
Deaggregation factor: 2.21
Unique aggregates announced to Internet: 175429
Total ASes present in the Internet Routing Table: 36218
Prefixes per ASN: 9.68
Origin-only ASes present in the Internet Routing Table: 31329
Origin ASes announcing only one prefix: 15077
Transit ASes present in the Internet Routing Table: 4889
Transit-only ASes present in the Internet Routing Table: 112
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 27
Max AS path prepend of ASN (32374) 19
Prefixes from unregistered ASNs in the Routing Table: 2019
Unregistered ASNs in the Routing Table: 385
Number of 32-bit ASNs allocated by the RIRs: 1311
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 2265
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 152
Number of addresses announced to Internet: 2436839680
Equivalent to 145 /8s, 63 /16s and 57 /24s
Percentage of available address space announced: 65.7
Percentage of allocated address space announced: 65.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 90.5
Total number of prefixes smaller than registry allocations: 144210

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

Prefixes being announced by APNIC Region ASes: 84448
Total APNIC prefixes after maximum aggregation: 28536
APNIC Deaggregation factor: 2.96
Prefixes being announced from the APNIC address blocks: 81760
Unique aggregates announced from the APNIC address blocks: 36775
APNIC Region origin ASes present in the Internet Routing Table: 4366
APNIC Prefixes per ASN: 18.73
APNIC Region origin ASes announcing only one prefix: 1233
APNIC Region transit ASes present in the Internet Routing Table: 660
Average APNIC Region AS path length visible: 4.1
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: 610112512
Equivalent to 36 /8s, 93 /16s and 148 /24s
Percentage of available APNIC address space announced: 77.4

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, 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: 138799
Total ARIN prefixes after maximum aggregation: 70763
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 111520
Unique aggregates announced from the ARIN address blocks: 45219
ARIN Region origin ASes present in the Internet Routing Table: 14268
ARIN Prefixes per ASN: 7.82
ARIN Region origin ASes announcing only one prefix: 5459
ARIN Region transit ASes present in the Internet Routing Table: 1419
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 798949120
Equivalent to 47 /8s, 158 /16s and 255 /24s
Percentage of available ARIN address space announced: 63.5

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: 84374
Total RIPE prefixes after maximum aggregation: 47846
RIPE Deaggregation factor: 1.76
Prefixes being announced from the RIPE address blocks: 77515
Unique aggregates announced from the RIPE address blocks: 51058
RIPE Region origin ASes present in the Internet Routing Table: 15546
RIPE Prefixes per ASN: 4.99
RIPE Region origin ASes announcing only one prefix: 7817
RIPE Region transit ASes present in the Internet Routing Table: 2403
Average RIPE Region AS path length visible: 3.6
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: 467262208
Equivalent to 27 /8s, 217 /16s and 219 /24s
Percentage of available RIPE address space announced: 75.3

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: 32154
Total LACNIC prefixes after maximum aggregation: 7324
LACNIC Deaggregation factor: 4.39
Prefixes being announced from the LACNIC address blocks: 31320
Unique aggregates announced from the LACNIC address blocks: 16484
LACNIC Region origin ASes present in the Internet Routing Table: 1429
LACNIC Prefixes per ASN: 21.92
LACNIC Region origin ASes announcing only one prefix: 432
LACNIC Region transit ASes present in the Internet Routing Table: 247
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 82601728
Equivalent to 4 /8s, 236 /16s and 103 /24s
Percentage of available LACNIC address space announced: 54.7

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: 7764
Total AfriNIC prefixes after maximum aggregation: 1832
AfriNIC Deaggregation factor: 4.24
Prefixes being announced from the AfriNIC address blocks: 6111
Unique aggregates announced from the AfriNIC address blocks: 1885
AfriNIC Region origin ASes present in the Internet Routing Table: 445
AfriNIC Prefixes per ASN: 13.73
AfriNIC Region origin ASes announcing only one prefix: 136
AfriNIC Region transit ASes present in the Internet Routing Table: 96
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 17
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 0
Number of AfriNIC addresses announced to Internet: 23362304
Equivalent to 1 /8s, 100 /16s and 123 /24s
Percentage of available AfriNIC address space announced: 34.8

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 1868 9474 600 Korea Telecom (KIX)
17974 1490 470 33 PT Telekomunikasi Indonesia
4755 1455 634 166 TATA Communications formerly
7545 1436 300 77 TPG Internet Pty Ltd
7552 1195 1064 7 Vietel Corporation
24560 1151 324 186 Bharti Airtel Ltd., Telemedia
9583 1056 78 494 Sify Limited
9829 1008 870 50 National Internet Backbone
4808 944 2019 276 CNCGROUP IP network China169
17488 941 165 99 Hathway IP Over Cable Interne

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 3649 3822 256 BellSouth.net Inc.
4323 2644 1105 400 tw telecom holdings, inc.
1785 1792 681 128 PaeTec Communications, Inc.
18566 1712 338 239 Covad Communications Co.
6478 1647 310 46 AT&T Services, Inc.
20115 1535 1552 638 Charter Communications
19262 1495 4949 298 Verizon Online LLC
7018 1362 6959 893 AT&T Services, Inc.
22773 1299 2865 84 Cox Communications Inc.
2386 1271 536 912 AT&T Data Communications Serv

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 540 326 30 Goldenlines main autonomous s
6830 517 1780 320 UPC Broadband
34984 509 106 182 BILISIM TELEKOM
3292 455 1997 391 TDC Data Networks
29049 450 33 48 AzerSat LLC.
8866 446 134 26 Bulgarian Telecommunication C
20940 443 130 338 Akamai Technologies European
3320 422 7609 367 Deutsche Telekom AG
12479 408 577 6 France Telecom Espana SA
8551 407 356 39 Bezeq International

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 1444 268 160 Types of queries are: POCs, o
28573 1266 988 87 Types of queries are: POCs, o
8151 1231 2669 360 Uninet S.A. de C.V.
6503 904 354 73 Axtel, S.A.B. de C.V.
7303 904 466 137 Telecom Argentina S.A.
14420 663 53 91 CORPORACION NACIONAL DE TELEC
22047 566 310 15 Types of queries are: POCs, o
3816 517 225 97 Types of queries are: POCs, o
14117 492 46 43 Telefonica del Sur S.A.
11172 486 99 81 Alestra, S. de R.L. de C.V.

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 877 445 11 TEDATA
24863 775 147 37 LINKdotNET AS number
15475 429 90 8 Nile Online
36992 300 415 13 Etisalat MISR
3741 267 985 227 The Internet Solution
6713 238 215 13 Itissalat Al-MAGHRIB
33776 227 13 5 Starcomms Nigeria Limited
24835 220 78 10 RAYA Telecom - Egypt
29571 161 17 11 Ci Telecom Autonomous system
16637 147 441 86 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 3649 3822 256 BellSouth.net Inc.
4323 2644 1105 400 tw telecom holdings, inc.
23456 2265 650 1240 32-bit ASN transition
4766 1868 9474 600 Korea Telecom (KIX)
1785 1792 681 128 PaeTec Communications, Inc.
18566 1712 338 239 Covad Communications Co.
6478 1647 310 46 AT&T Services, Inc.
20115 1535 1552 638 Charter Communications
19262 1495 4949 298 Verizon Online LLC
17974 1490 470 33 PT Telekomunikasi Indonesia

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 2644 2244 tw telecom holdings, inc.
1785 1792 1664 PaeTec Communications, Inc.
6478 1647 1601 AT&T Services, Inc.
18566 1712 1473 Covad Communications Co.
17974 1490 1457 PT Telekomunikasi Indonesia
7545 1436 1359 TPG Internet Pty Ltd
4755 1455 1289 TATA Communications formerly
10620 1444 1284 Types of queries are: POCs, o
4766 1868 1268 Korea Telecom (KIX)
11492 1255 1240 CABLE ONE, 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 *
32805 UNALLOCATED 12.1.225.0/24 7018 AT&T Services, Inc.
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T Services, Inc.
32567 UNALLOCATED 12.14.170.0/24 7018 AT&T Services, Inc.
16504 UNALLOCATED 12.18.155.0/24 30170 Optic Fusion
32567 UNALLOCATED 12.25.107.0/24 4323 tw telecom holdings,
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.
26973 UNALLOCATED 12.39.152.0/24 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
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 65535 Internet Assigned Numbers Aut
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
23.19.0.0/16 15003 TEGRIS Corporation
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
41.222.79.0/24 36938 >>UNKNOWN<<
41.223.92.0/22 36936 >>UNKNOWN<<
45.127.0.0/16 13767 DataBank Holdings, Ltd.

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 /8:21 /9:12 /10:28 /11:77 /12:221
/13:459 /14:787 /15:1384 /16:11644 /17:5731 /18:9568
/19:19266 /20:25635 /21:25523 /22:33537 /23:32285 /24:183905
/25:11 /26:17 /27:23 /28:160 /29:93 /30:52
/31:0 /32:120

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

ASN No of nets Total ann. Description
6389 2250 3649 BellSouth.net Inc.
18566 1686 1712 Covad Communications Co.
6478 1601 1647 AT&T Services, Inc.
4323 1340 2644 tw telecom holdings, inc.
10620 1334 1444 Types of queries are: POCs, o
11492 1204 1255 CABLE ONE, INC.
23456 1135 2265 32-bit ASN transition
7011 1062 1161 Frontier Communications of Am
1785 1059 1792 PaeTec Communications, Inc.
22773 843 1299 Cox Communications Inc.

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

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

1:262 2:45 4:14 5:1 6:3 8:349
12:2005 13:1 14:419 15:15 16:3 17:8
20:9 23:5 24:1600 27:723 31:226 32:55
33:3 34:2 37:1 38:759 40:101 41:2441
42:3 44:3 46:872 47:4 49:176 50:371
52:13 55:4 56:2 57:29 58:795 59:470
60:355 61:1091 62:984 63:1916 64:3913 65:2321
66:4350 67:1864 68:1080 69:2955 70:700 71:345
72:1908 73:1 74:2355 75:297 76:336 77:836
78:680 79:461 80:1081 81:830 82:497 83:465
84:648 85:1082 86:563 87:751 88:333 89:1588
90:183 91:3722 92:506 93:1058 94:1265 95:796
96:469 97:251 98:824 99:35 101:58 103:5
106:1 107:5 108:84 109:918 110:550 111:689
112:313 113:395 114:498 115:676 116:932 117:677
118:768 119:1136 120:299 121:648 122:1621 123:1055
124:1221 125:1203 128:214 129:159 130:166 131:564
132:104 133:19 134:209 135:49 136:211 137:138
138:302 139:104 140:465 141:174 142:384 143:397
144:481 145:52 146:434 147:207 148:570 149:242
150:165 151:187 152:306 153:179 154:2 155:396
156:188 157:325 158:132 159:377 160:313 161:235
162:276 163:155 164:491 165:348 166:511 167:426
168:714 169:152 170:782 171:76 172:1 173:1512
174:529 175:348 177:79 178:853 180:815 181:13
182:421 183:201 184:255 185:1 186:1134 187:821
188:987 189:1020 190:4836 192:5743 193:4832 194:3460
195:2968 196:1216 197:16 198:3518 199:3885 200:5501
201:1491 202:8109 203:8308 204:4054 205:2299 206:2651
207:2955 208:3958 209:3458 210:2640 211:1375 212:1989
213:1708 214:734 215:66 216:4857 217:1655 218:550
219:372 220:1193 221:465 222:305 223:128

End of report
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