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.

Saturday, March 5, 2011

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sun 06 Mar, 2011

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

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

BGP routing table entries examined: 344149
Prefixes after maximum aggregation: 156566
Deaggregation factor: 2.20
Unique aggregates announced to Internet: 172139
Total ASes present in the Internet Routing Table: 35854
Prefixes per ASN: 9.60
Origin-only ASes present in the Internet Routing Table: 31012
Origin ASes announcing only one prefix: 14963
Transit ASes present in the Internet Routing Table: 4842
Transit-only ASes present in the Internet Routing Table: 111
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 26
Max AS path prepend of ASN (23456) 20
Prefixes from unregistered ASNs in the Routing Table: 1361
Unregistered ASNs in the Routing Table: 288
Number of 32-bit ASNs allocated by the RIRs: 1173
Prefixes from 32-bit ASNs in the Routing Table: 1802
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 256
Number of addresses announced to Internet: 2473111296
Equivalent to 147 /8s, 104 /16s and 175 /24s
Percentage of available address space announced: 66.7
Percentage of allocated address space announced: 66.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 89.1
Total number of prefixes smaller than registry allocations: 141034

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

Prefixes being announced by APNIC Region ASes: 82801
Total APNIC prefixes after maximum aggregation: 28303
APNIC Deaggregation factor: 2.93
Prefixes being announced from the APNIC address blocks: 80408
Unique aggregates announced from the APNIC address blocks: 36088
APNIC Region origin ASes present in the Internet Routing Table: 4295
APNIC Prefixes per ASN: 18.72
APNIC Region origin ASes announcing only one prefix: 1216
APNIC Region transit ASes present in the Internet Routing Table: 657
Average APNIC Region AS path length visible: 4.2
Max APNIC Region AS path length visible: 26
Number of APNIC addresses announced to Internet: 594263808
Equivalent to 35 /8s, 107 /16s and 191 /24s
Percentage of available APNIC address space announced: 75.4

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: 137141
Total ARIN prefixes after maximum aggregation: 70137
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 109879
Unique aggregates announced from the ARIN address blocks: 44950
ARIN Region origin ASes present in the Internet Routing Table: 14153
ARIN Prefixes per ASN: 7.76
ARIN Region origin ASes announcing only one prefix: 5405
ARIN Region transit ASes present in the Internet Routing Table: 1392
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 22
Number of ARIN addresses announced to Internet: 787534080
Equivalent to 46 /8s, 240 /16s and 209 /24s
Percentage of available ARIN address space announced: 62.6

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: 82766
Total RIPE prefixes after maximum aggregation: 46903
RIPE Deaggregation factor: 1.76
Prefixes being announced from the RIPE address blocks: 76038
Unique aggregates announced from the RIPE address blocks: 49346
RIPE Region origin ASes present in the Internet Routing Table: 15383
RIPE Prefixes per ASN: 4.94
RIPE Region origin ASes announcing only one prefix: 7777
RIPE Region transit ASes present in the Internet Routing Table: 2389
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 25
Number of RIPE addresses announced to Internet: 478749952
Equivalent to 28 /8s, 137 /16s and 37 /24s
Percentage of available RIPE address space announced: 77.1

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: 31442
Total LACNIC prefixes after maximum aggregation: 7264
LACNIC Deaggregation factor: 4.33
Prefixes being announced from the LACNIC address blocks: 30467
Unique aggregates announced from the LACNIC address blocks: 16098
LACNIC Region origin ASes present in the Internet Routing Table: 1421
LACNIC Prefixes per ASN: 21.44
LACNIC Region origin ASes announcing only one prefix: 437
LACNIC Region transit ASes present in the Internet Routing Table: 252
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 19
Number of LACNIC addresses announced to Internet: 81310464
Equivalent to 4 /8s, 216 /16s and 179 /24s
Percentage of available LACNIC address space announced: 53.8

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: 7523
Total AfriNIC prefixes after maximum aggregation: 1816
AfriNIC Deaggregation factor: 4.14
Prefixes being announced from the AfriNIC address blocks: 5906
Unique aggregates announced from the AfriNIC address blocks: 1835
AfriNIC Region origin ASes present in the Internet Routing Table: 433
AfriNIC Prefixes per ASN: 13.64
AfriNIC Region origin ASes announcing only one prefix: 128
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: 21897728
Equivalent to 1 /8s, 78 /16s and 34 /24s
Percentage of available AfriNIC address space announced: 32.6

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 1863 9493 590 Korea Telecom (KIX)
7545 1579 301 83 TPG Internet Pty Ltd
4755 1420 638 165 TATA Communications formerly
17974 1399 467 30 PT Telekomunikasi Indonesia
24560 1117 324 186 Bharti Airtel Ltd., Telemedia
9583 1044 76 487 Sify Limited
17488 939 161 102 Hathway IP Over Cable Interne
4808 938 2032 271 CNCGROUP IP network China169
18101 938 117 144 Reliance Infocom Ltd Internet
9829 898 764 46 National Internet Backbone

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 3684 3855 261 BellSouth.net Inc.
4323 2581 1125 404 tw telecom holdings, inc.
19262 1829 4953 282 Verizon Online LLC
1785 1793 697 131 PaeTec Communications, Inc.
6478 1533 298 89 AT&T Services, Inc.
20115 1527 1534 650 Charter Communications
18566 1518 325 176 Covad Communications Co.
7018 1381 6740 902 AT&T Services, Inc.
2386 1300 539 940 AT&T Data Communications Serv
11492 1288 236 70 CABLE ONE, INC.

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 542 328 31 Goldenlines main autonomous s
6830 512 1780 318 UPC Broadband
9198 470 267 15 Kazakhtelecom Data Network Ad
34984 466 98 146 BILISIM TELEKOM
3292 448 1996 389 TDC Data Networks
8866 442 133 23 Bulgarian Telecommunication C
20940 419 99 323 Akamai Technologies European
8551 405 355 38 Bezeq International
3320 404 7604 352 Deutsche Telekom AG
702 401 1803 315 >>UNKNOWN<<

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 1388 258 163 Types of queries are: POCs, o
8151 1219 2667 362 Uninet S.A. de C.V.
28573 1207 961 83 Types of queries are: POCs, o
6503 1165 354 74 Axtel, S.A.B. de C.V.
7303 888 463 134 Telecom Argentina S.A.
14420 644 56 93 CORPORACION NACIONAL DE TELEC
22047 541 310 15 Types of queries are: POCs, o
3816 516 225 95 Types of queries are: POCs, o
7738 479 922 30 Telecomunicacoes da Bahia S.A
14117 467 36 37 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 803 445 11 TEDATA
24863 765 147 37 LINKdotNET AS number
15475 440 90 10 Nile Online
36992 301 271 14 Etisalat MISR
3741 266 987 228 The Internet Solution
33776 230 13 5 Starcomms Nigeria Limited
24835 225 78 10 RAYA Telecom - Egypt
6713 200 199 11 Itissalat Al-MAGHRIB
29571 192 17 11 Ci Telecom Autonomous system
16637 140 422 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 3684 3855 261 BellSouth.net Inc.
4323 2581 1125 404 tw telecom holdings, inc.
4766 1863 9493 590 Korea Telecom (KIX)
19262 1829 4953 282 Verizon Online LLC
23456 1802 467 1020 32-bit ASN transition
1785 1793 697 131 PaeTec Communications, Inc.
7545 1579 301 83 TPG Internet Pty Ltd
6478 1533 298 89 AT&T Services, Inc.
20115 1527 1534 650 Charter Communications
18566 1518 325 176 Covad Communications Co.

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 2581 2177 tw telecom holdings, inc.
1785 1793 1662 PaeTec Communications, Inc.
19262 1829 1547 Verizon Online LLC
7545 1579 1496 TPG Internet Pty Ltd
6478 1533 1444 AT&T Services, Inc.
17974 1399 1369 PT Telekomunikasi Indonesia
18566 1518 1342 Covad Communications Co.
4766 1863 1273 Korea Telecom (KIX)
4755 1420 1255 TATA Communications formerly
10620 1388 1225 Types of queries are: POCs, o

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 Services, Inc.
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
13746 UNALLOCATED 12.24.56.0/24 7018 AT&T Services, Inc.
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.

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
1.5.0.0/16 38639 for assignment to JPNIC membe
1.6.0.0/15 38639 for assignment to JPNIC membe
1.8.0.0/16 38639 for assignment to JPNIC membe
1.20.0.0/16 38639 for assignment to JPNIC membe
1.32.0.0/16 38639 for assignment to JPNIC membe
1.37.0.0/16 38639 for assignment to JPNIC membe
1.187.0.0/16 38639 for assignment to JPNIC membe
14.0.0.0/24 38639 for assignment to JPNIC membe
14.0.1.0/24 38639 for assignment to JPNIC membe
14.0.2.0/23 38639 for assignment to JPNIC membe

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 /8:25 /9:10 /10:26 /11:72 /12:217
/13:445 /14:765 /15:1370 /16:11523 /17:5623 /18:9298
/19:19063 /20:24551 /21:25035 /22:33339 /23:31699 /24:180632
/25:11 /26:17 /27:23 /28:152 /29:95 /30:47
/31:0 /32:111

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

ASN No of nets Total ann. Description
6389 2272 3684 BellSouth.net Inc.
18566 1496 1518 Covad Communications Co.
6478 1487 1533 AT&T Services, Inc.
4323 1389 2581 tw telecom holdings, inc.
10620 1279 1388 Types of queries are: POCs, o
11492 1245 1288 CABLE ONE, INC.
7011 1057 1158 Frontier Communications of Am
1785 1055 1793 PaeTec Communications, Inc.
23456 1017 1802 32-bit ASN transition
6503 947 1165 Axtel, S.A.B. de C.V.

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

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

1:261 2:41 4:14 5:1 8:338 9:1
12:2010 13:1 14:403 15:15 16:3 17:8
20:9 23:1 24:1506 27:592 31:3 32:56
33:4 34:2 36:2 37:1 38:707 39:1
40:101 41:2301 42:13 44:3 46:652 47:4
49:163 50:180 52:13 55:3 56:2 57:29
58:756 59:474 60:382 61:1009 62:1023 63:1920
64:3815 65:2345 66:4314 67:1778 68:1064 69:2875
70:699 71:406 72:1997 73:1 74:2346 75:291
76:341 77:844 78:679 79:445 80:1058 81:793
82:524 83:466 84:635 85:1047 86:520 87:763
88:357 89:1567 90:169 91:3576 92:495 93:1055
94:1227 95:773 96:458 97:252 98:811 99:34
101:46 106:1 107:4 108:129 109:911 110:475
111:713 112:302 113:387 114:490 115:663 116:938
117:674 118:674 119:1039 120:254 121:664 122:1620
123:1038 124:1276 125:1253 128:214 129:159 130:166
131:558 132:101 133:20 134:211 135:49 136:208
137:143 138:296 139:116 140:463 141:203 142:357
143:379 144:488 145:51 146:431 147:202 148:621
149:263 150:162 151:230 152:296 153:180 154:2
155:376 156:175 157:314 158:126 159:369 160:310
161:201 162:277 163:147 164:481 165:342 166:501
167:409 168:716 169:156 170:752 171:69 172:2
173:1249 174:518 175:321 176:1 177:35 178:780
180:805 181:4 182:380 183:244 184:249 186:1037
187:806 188:907 189:1013 190:4566 192:5725 193:4780
194:3484 195:2961 196:1199 197:4 198:3493 199:3811
200:5549 201:1578 202:8043 203:8348 204:4033 205:2280
206:2546 207:2994 208:3886 209:3453 210:2602 211:1348
212:1942 213:1728 214:758 215:63 216:4818 217:1650
218:535 219:371 220:1195 221:456 222:314 223:99


End of report
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