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, March 22, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 23 Mar, 2012

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

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

BGP routing table entries examined: 395685
Prefixes after maximum aggregation: 169265
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 195067
Total ASes present in the Internet Routing Table: 38204
Prefixes per ASN: 10.36
Origin-only ASes present in the Internet Routing Table: 32935
Origin ASes announcing only one prefix: 15517
Transit ASes present in the Internet Routing Table: 5269
Transit-only ASes present in the Internet Routing Table: 122
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 26
Max AS path prepend of ASN (51742) 24
Prefixes from unregistered ASNs in the Routing Table: 1329
Unregistered ASNs in the Routing Table: 310
Number of 32-bit ASNs allocated by the RIRs: 2328
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5088
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 861
Number of addresses announced to Internet: 2546017792
Equivalent to 151 /8s, 193 /16s and 38 /24s
Percentage of available address space announced: 68.7
Percentage of allocated address space announced: 68.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 92.1
Total number of prefixes smaller than registry allocations: 166758

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

Prefixes being announced by APNIC Region ASes: 92826
Total APNIC prefixes after maximum aggregation: 30613
APNIC Deaggregation factor: 3.03
Prefixes being announced from the APNIC address blocks: 90243
Unique aggregates announced from the APNIC address blocks: 39372
APNIC Region origin ASes present in the Internet Routing Table: 4633
APNIC Prefixes per ASN: 19.48
APNIC Region origin ASes announcing only one prefix: 1261
APNIC Region transit ASes present in the Internet Routing Table: 702
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 17
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 641031936
Equivalent to 38 /8s, 53 /16s and 95 /24s
Percentage of available APNIC address space announced: 81.3

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: 147734
Total ARIN prefixes after maximum aggregation: 75307
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 119520
Unique aggregates announced from the ARIN address blocks: 49817
ARIN Region origin ASes present in the Internet Routing Table: 14874
ARIN Prefixes per ASN: 8.04
ARIN Region origin ASes announcing only one prefix: 5676
ARIN Region transit ASes present in the Internet Routing Table: 1505
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: 806595328
Equivalent to 48 /8s, 19 /16s and 171 /24s
Percentage of available ARIN address space announced: 64.1

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: 101735
Total RIPE prefixes after maximum aggregation: 53058
RIPE Deaggregation factor: 1.92
Prefixes being announced from the RIPE address blocks: 93135
Unique aggregates announced from the RIPE address blocks: 57143
RIPE Region origin ASes present in the Internet Routing Table: 16355
RIPE Prefixes per ASN: 5.69
RIPE Region origin ASes announcing only one prefix: 7986
RIPE Region transit ASes present in the Internet Routing Table: 2598
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 26
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 502188544
Equivalent to 29 /8s, 238 /16s and 202 /24s
Percentage of available RIPE address space announced: 80.9

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: 38516
Total LACNIC prefixes after maximum aggregation: 7989
LACNIC Deaggregation factor: 4.82
Prefixes being announced from the LACNIC address blocks: 38389
Unique aggregates announced from the LACNIC address blocks: 19674
LACNIC Region origin ASes present in the Internet Routing Table: 1563
LACNIC Prefixes per ASN: 24.56
LACNIC Region origin ASes announcing only one prefix: 435
LACNIC Region transit ASes present in the Internet Routing Table: 285
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 17
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 98563840
Equivalent to 5 /8s, 223 /16s and 247 /24s
Percentage of available LACNIC address space announced: 65.3

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: 8829
Total AfriNIC prefixes after maximum aggregation: 2117
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6920
Unique aggregates announced from the AfriNIC address blocks: 2186
AfriNIC Region origin ASes present in the Internet Routing Table: 519
AfriNIC Prefixes per ASN: 13.33
AfriNIC Region origin ASes announcing only one prefix: 159
AfriNIC Region transit ASes present in the Internet Routing Table: 114
Average AfriNIC Region AS path length visible: 3.5
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: 31478272
Equivalent to 1 /8s, 224 /16s and 82 /24s
Percentage of available AfriNIC address space announced: 46.9

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 1936 11107 684 Korea Telecom (KIX)
17974 1674 502 63 PT Telekomunikasi Indonesia
7545 1651 303 88 TPG Internet Pty Ltd
4755 1554 385 159 TATA Communications formerly
9583 1234 94 539 Sify Limited
9829 1187 1001 30 National Internet Backbone
7552 1114 1062 11 Vietel Corporation
24560 1012 384 166 Bharti Airtel Ltd., Telemedia
4808 984 1946 283 CNCGROUP IP network China169
18101 948 130 159 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
7029 3410 1016 168 Windstream Communications Inc
6389 3375 3807 198 BellSouth.net Inc.
18566 2094 383 179 Covad Communications Co.
1785 1887 680 127 PaeTec Communications, Inc.
20115 1632 1558 628 Charter Communications
4323 1600 1076 382 tw telecom holdings, inc.
22773 1545 2910 111 Cox Communications Inc.
30036 1399 253 745 Mediacom Communications Corp
7018 1286 9809 842 AT&T Services, Inc.
11492 1165 212 413 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
8402 1669 544 16 Corbina telecom
2118 1427 97 13 EUnet/RELCOM Autonomous Syste
15557 1034 2247 55 NEUF CEGETEL (formerly LDCOM
31148 671 37 9 FreeNet ISP
34984 663 188 173 BILISIM TELEKOM
6830 641 1943 412 UPC Broadband
12479 639 653 56 France Telecom Espana SA
20940 622 202 488 Akamai Technologies European
9116 541 326 32 Goldenlines main autonomous s
3320 532 8442 398 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 1807 329 130 Types of queries are: POCs, o
28573 1726 1099 60 Types of queries are: POCs, o
7303 1350 825 189 Telecom Argentina S.A.
8151 1338 2998 339 Uninet S.A. de C.V.
26615 901 684 29 Tim Celular S.A.
27947 664 69 110 Telconet S.A
11172 638 107 74 Alestra, S. de R.L. de C.V.
22047 584 326 15 Types of queries are: POCs, o
3816 563 239 96 Types of queries are: POCs, o
7738 550 1050 31 Telecomunicacoes da Bahia 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 1260 958 13 TEDATA
24863 841 274 34 LINKdotNET AS number
6713 489 649 18 Itissalat Al-MAGHRIB
3741 271 923 228 The Internet Solution
15706 227 32 6 Sudatel Internet Exchange Aut
12258 197 28 62 Vodacom Internet Company
15399 190 29 12 Wananchi Online Limited
24835 178 80 8 RAYA Telecom - Egypt
33776 162 12 25 Starcomms Nigeria Limited
36923 157 20 4 Swift Networks Limited

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
7029 3410 1016 168 Windstream Communications Inc
6389 3375 3807 198 BellSouth.net Inc.
18566 2094 383 179 Covad Communications Co.
4766 1936 11107 684 Korea Telecom (KIX)
1785 1887 680 127 PaeTec Communications, Inc.
10620 1807 329 130 Types of queries are: POCs, o
28573 1726 1099 60 Types of queries are: POCs, o
17974 1674 502 63 PT Telekomunikasi Indonesia
8402 1669 544 16 Corbina telecom
7545 1651 303 88 TPG Internet Pty Ltd

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

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

ASN No of nets Net Savings Description
6389 3375 3177 BellSouth.net Inc.
18566 2094 1915 Covad Communications Co.
1785 1887 1760 PaeTec Communications, Inc.
10620 1807 1677 Types of queries are: POCs, o
28573 1726 1666 Types of queries are: POCs, o
8402 1669 1653 Corbina telecom
17974 1674 1611 PT Telekomunikasi Indonesia
7545 1651 1563 TPG Internet Pty Ltd
22773 1545 1434 Cox Communications Inc.
2118 1427 1414 EUnet/RELCOM Autonomous Syste

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
54439 UNALLOCATED 8.25.174.0/24 3356 Level 3 Communicatio
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.

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
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg
14.192.24.0/22 45464 Room 201, TGU Bldg
14.192.28.0/22 45464 Room 201, TGU Bldg
23.27.0.0/20 54500 EGIHosting
23.27.16.0/20 54500 EGIHosting

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 /10:28 /11:81 /12:235
/13:458 /14:821 /15:1475 /16:12145 /17:6242 /18:10373
/19:20534 /20:28502 /21:29282 /22:39613 /23:37098 /24:208205
/25:11 /26:20 /27:20 /28:154 /29:143 /30:68
/31:0 /32:145

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

ASN No of nets Total ann. Description
7029 3053 3410 Windstream Communications Inc
6389 2090 3375 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1704 1807 Types of queries are: POCs, o
8402 1646 1669 Corbina telecom
30036 1347 1399 Mediacom Communications Corp
11492 1128 1165 CABLE ONE, INC.
8452 1070 1260 TEDATA
1785 1066 1887 PaeTec Communications, Inc.
7011 1037 1151 Frontier Communications of Am

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

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

1:530 2:685 4:14 6:3 8:393 12:1974
13:1 14:595 15:12 16:3 17:7 20:8
23:147 24:1748 27:1238 31:953 32:57 33:2
34:2 36:8 37:292 38:772 40:120 41:3034
42:128 44:3 46:1451 47:3 49:339 50:515
52:13 54:6 55:11 56:3 57:35 58:911
59:485 60:274 61:1085 62:979 63:1987 64:4173
65:2270 66:4472 67:2006 68:1147 69:3182 70:901
71:438 72:1801 74:2590 75:491 76:319 77:960
78:976 79:489 80:1235 81:905 82:647 83:552
84:617 85:1196 86:731 87:921 88:348 89:1616
90:296 91:4635 92:520 93:1472 94:1454 95:1151
96:370 97:315 98:816 99:38 100:6 101:147
103:908 106:63 107:177 108:207 109:1552 110:734
111:896 112:431 113:542 114:624 115:759 116:885
117:706 118:905 119:1187 120:334 121:669 122:1619
123:1090 124:1297 125:1260 128:515 129:173 130:258
131:591 132:165 133:21 134:232 135:63 136:209
137:191 138:274 139:144 140:468 141:239 142:368
143:397 144:495 145:69 146:487 147:243 148:703
149:294 150:149 151:176 152:457 153:171 154:6
155:445 156:210 157:335 158:163 159:448 160:325
161:231 162:340 163:176 164:540 165:392 166:561
167:463 168:805 169:147 170:844 171:123 172:2
173:1716 174:594 175:421 176:459 177:559 178:1295
180:1114 181:73 182:737 183:277 184:442 185:1
186:2135 187:837 188:1145 189:1189 190:5532 192:5947
193:5600 194:4570 195:3635 196:1259 197:187 198:3577
199:4421 200:5658 201:1652 202:8193 203:8494 204:4273
205:2442 206:2651 207:2731 208:4043 209:3583 210:2682
211:1441 212:1992 213:1905 214:874 215:107 216:5030
217:1528 218:521 219:329 220:1226 221:536 222:297
223:313

End of report
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