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, May 29, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 30 May, 2012

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

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

BGP routing table entries examined: 404893
Prefixes after maximum aggregation: 172150
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 200301
Total ASes present in the Internet Routing Table: 38585
Prefixes per ASN: 10.49
Origin-only ASes present in the Internet Routing Table: 33293
Origin ASes announcing only one prefix: 15677
Transit ASes present in the Internet Routing Table: 5292
Transit-only ASes present in the Internet Routing Table: 113
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: 1175
Unregistered ASNs in the Routing Table: 229
Number of 32-bit ASNs allocated by the RIRs: 2761
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6090
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 114
Number of addresses announced to Internet: 2579059200
Equivalent to 153 /8s, 185 /16s and 82 /24s
Percentage of available address space announced: 69.6
Percentage of allocated address space announced: 69.7
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 171157

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

Prefixes being announced by APNIC Region ASes: 94823
Total APNIC prefixes after maximum aggregation: 30967
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 92314
Unique aggregates announced from the APNIC address blocks: 40044
APNIC Region origin ASes present in the Internet Routing Table: 4652
APNIC Prefixes per ASN: 19.84
APNIC Region origin ASes announcing only one prefix: 1267
APNIC Region transit ASes present in the Internet Routing Table: 713
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: 645417216
Equivalent to 38 /8s, 120 /16s and 73 /24s
Percentage of available APNIC address space announced: 81.9

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: 150185
Total ARIN prefixes after maximum aggregation: 76368
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120815
Unique aggregates announced from the ARIN address blocks: 51207
ARIN Region origin ASes present in the Internet Routing Table: 15076
ARIN Prefixes per ASN: 8.01
ARIN Region origin ASes announcing only one prefix: 5739
ARIN Region transit ASes present in the Internet Routing Table: 1518
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 19
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 816606976
Equivalent to 48 /8s, 172 /16s and 111 /24s
Percentage of available ARIN address space announced: 65.1

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: 102877
Total RIPE prefixes after maximum aggregation: 54489
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 94971
Unique aggregates announced from the RIPE address blocks: 59269
RIPE Region origin ASes present in the Internet Routing Table: 16584
RIPE Prefixes per ASN: 5.73
RIPE Region origin ASes announcing only one prefix: 8064
RIPE Region transit ASes present in the Internet Routing Table: 2582
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: 515027200
Equivalent to 30 /8s, 178 /16s and 177 /24s
Percentage of available RIPE address space announced: 83.0

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: 40733
Total LACNIC prefixes after maximum aggregation: 8084
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 41128
Unique aggregates announced from the LACNIC address blocks: 20512
LACNIC Region origin ASes present in the Internet Routing Table: 1584
LACNIC Prefixes per ASN: 25.96
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 294
Average LACNIC Region AS path length visible: 3.9
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: 101416960
Equivalent to 6 /8s, 11 /16s and 128 /24s
Percentage of available LACNIC address space announced: 67.2

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: 9344
Total AfriNIC prefixes after maximum aggregation: 2178
AfriNIC Deaggregation factor: 4.29
Prefixes being announced from the AfriNIC address blocks: 7411
Unique aggregates announced from the AfriNIC address blocks: 2181
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.72
AfriNIC Region origin ASes announcing only one prefix: 164
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 31742720
Equivalent to 1 /8s, 228 /16s and 91 /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 11104 732 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1667 301 88 TPG Internet Pty Ltd
4755 1553 384 153 TATA Communications formerly
9829 1298 1085 28 National Internet Backbone
9583 1161 87 499 Sify Limited
7552 1126 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 63 BHARTI Airtel Ltd.
4808 951 1938 283 CNCGROUP IP network China169

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 3412 3807 194 BellSouth.net Inc.
7029 3375 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
1785 1908 680 130 PaeTec Communications, Inc.
20115 1645 1569 619 Charter Communications
22773 1609 2911 121 Cox Communications Inc.
4323 1566 1058 383 tw telecom holdings, inc.
30036 1408 261 756 Mediacom Communications Corp
7018 1232 10064 829 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 1652 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 698 188 172 BILISIM TELEKOM
12479 690 678 70 France Telecom Espana SA
31148 682 37 9 FreeNet ISP
6830 654 2215 425 UPC Broadband
20940 646 215 513 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 506 364 61 Bezeq International
3320 489 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 1920 340 201 Types of queries are: POCs, o
28573 1891 1180 57 Types of queries are: POCs, o
6503 1524 418 67 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1334 3020 326 Uninet S.A. de C.V.
26615 903 760 32 Tim Celular S.A.
11172 644 107 74 Alestra, S. de R.L. de C.V.
3816 588 247 89 Types of queries are: POCs, o
22047 583 326 15 Types of queries are: POCs, o
7738 551 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 1367 958 13 TEDATA
24863 843 274 32 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 210 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
15706 165 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 3412 3807 194 BellSouth.net Inc.
7029 3375 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
4766 1982 11104 732 Korea Telecom (KIX)
10620 1920 340 201 Types of queries are: POCs, o
1785 1908 680 130 PaeTec Communications, Inc.
28573 1891 1180 57 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1667 301 88 TPG Internet Pty Ltd
8402 1652 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 3375 3204 Windstream Communications Inc
18566 2094 1913 Covad Communications Co.
28573 1891 1834 Types of queries are: POCs, o
1785 1908 1778 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1920 1719 Types of queries are: POCs, o
8402 1652 1636 Corbina telecom
7545 1667 1579 TPG Internet Pty Ltd
22773 1609 1488 Cox Communications Inc.
6503 1524 1457 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
5.45.176.0/21 29141 Bradler & Krantz, Bochum, Ger
5.53.32.0/19 30783 Rased Maral Ava Jonoob JSC
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

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 /9:13 /10:30 /11:81 /12:236
/13:460 /14:831 /15:1501 /16:12245 /17:6267 /18:10523
/19:20679 /20:29333 /21:30566 /22:40135 /23:38124 /24:213271
/25:11 /26:21 /27:20 /28:154 /29:151 /30:79
/31:0 /32:142

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

ASN No of nets Total ann. Description
7029 3016 3375 Windstream Communications Inc
6389 2130 3412 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1734 1920 Types of queries are: POCs, o
8402 1630 1652 Corbina telecom
30036 1349 1408 Mediacom Communications Corp
6503 1278 1524 Axtel, S.A.B. de C.V.
8452 1169 1367 TEDATA
11492 1146 1182 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)
----------------------------------------------

1:551 2:695 4:13 5:38 6:3 8:420
12:1965 13:1 14:612 15:12 16:3 17:5
20:23 23:171 24:1769 27:1312 31:1000 32:52
33:2 34:2 36:8 37:633 38:806 40:119
41:3234 42:139 44:3 46:1431 47:3 49:448
50:547 52:13 54:12 55:7 56:3 57:27
58:910 59:491 60:248 61:1113 62:1013 63:2004
64:4229 65:2245 66:4459 67:2004 68:1157 69:3181
70:932 71:493 72:1824 74:2598 75:494 76:329
77:942 78:981 79:492 80:1222 81:940 82:666
83:543 84:495 85:1204 86:445 87:909 88:346
89:1718 90:292 91:4860 92:549 93:1352 94:1558
95:1170 96:357 97:313 98:864 99:35 100:7
101:204 103:1078 106:104 107:185 108:294 109:1335
110:741 111:923 112:400 113:588 114:623 115:836
116:915 117:705 118:905 119:1203 120:347 121:677
122:1626 123:1102 124:1324 125:1258 128:517 129:189
130:240 131:628 132:281 133:22 134:238 135:62
136:213 137:238 138:359 139:184 140:469 141:251
142:396 143:549 144:533 145:72 146:498 147:284
148:751 149:305 150:185 151:175 152:466 153:172
154:11 155:419 156:219 157:278 158:184 159:483
160:340 161:241 162:342 163:180 164:597 165:401
166:592 167:468 168:859 169:125 170:876 171:132
172:2 173:1754 174:582 175:423 176:537 177:814
178:1382 180:1211 181:88 182:1017 183:227 184:498
185:1 186:2218 187:1098 188:1292 189:1805 190:5494
192:5966 193:5567 194:4525 195:3416 196:1191 197:148
198:3613 199:4623 200:5731 201:1922 202:8332 203:8490
204:4260 205:2504 206:2675 207:2732 208:4056 209:3604
210:2692 211:1516 212:2038 213:1934 214:844 215:95
216:5079 217:1553 218:536 219:308 220:1235 221:546
222:286 223:348

End of report
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