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.

Monday, April 30, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Tue 01 May, 2012

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

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

BGP routing table entries examined: 400373
Prefixes after maximum aggregation: 170939
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198098
Total ASes present in the Internet Routing Table: 38416
Prefixes per ASN: 10.42
Origin-only ASes present in the Internet Routing Table: 33122
Origin ASes announcing only one prefix: 15639
Transit ASes present in the Internet Routing Table: 5294
Transit-only ASes present in the Internet Routing Table: 118
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 27
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 1208
Unregistered ASNs in the Routing Table: 222
Number of 32-bit ASNs allocated by the RIRs: 2652
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5630
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2562378496
Equivalent to 152 /8s, 186 /16s and 203 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.2
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.5
Total number of prefixes smaller than registry allocations: 169395

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

Prefixes being announced by APNIC Region ASes: 93686
Total APNIC prefixes after maximum aggregation: 30864
APNIC Deaggregation factor: 3.04
Prefixes being announced from the APNIC address blocks: 91186
Unique aggregates announced from the APNIC address blocks: 39917
APNIC Region origin ASes present in the Internet Routing Table: 4639
APNIC Prefixes per ASN: 19.66
APNIC Region origin ASes announcing only one prefix: 1264
APNIC Region transit ASes present in the Internet Routing Table: 711
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: 644148480
Equivalent to 38 /8s, 100 /16s and 237 /24s
Percentage of available APNIC address space announced: 81.7

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: 149049
Total ARIN prefixes after maximum aggregation: 75879
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120396
Unique aggregates announced from the ARIN address blocks: 50422
ARIN Region origin ASes present in the Internet Routing Table: 15004
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5727
ARIN Region transit ASes present in the Internet Routing Table: 1514
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: 807232256
Equivalent to 48 /8s, 29 /16s and 99 /24s
Percentage of available ARIN address space announced: 64.4

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, 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: 101963
Total RIPE prefixes after maximum aggregation: 53834
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93951
Unique aggregates announced from the RIPE address blocks: 58406
RIPE Region origin ASes present in the Internet Routing Table: 16503
RIPE Prefixes per ASN: 5.69
RIPE Region origin ASes announcing only one prefix: 8041
RIPE Region transit ASes present in the Internet Routing Table: 2587
Average RIPE Region AS path length visible: 3.5
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: 511349504
Equivalent to 30 /8s, 122 /16s and 147 /24s
Percentage of available RIPE address space announced: 82.4

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: 40293
Total LACNIC prefixes after maximum aggregation: 8138
LACNIC Deaggregation factor: 4.95
Prefixes being announced from the LACNIC address blocks: 40354
Unique aggregates announced from the LACNIC address blocks: 20303
LACNIC Region origin ASes present in the Internet Routing Table: 1579
LACNIC Prefixes per ASN: 25.56
LACNIC Region origin ASes announcing only one prefix: 440
LACNIC Region transit ASes present in the Internet Routing Table: 290
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: 99702784
Equivalent to 5 /8s, 241 /16s and 88 /24s
Percentage of available LACNIC address space announced: 66.0

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: 8928
Total AfriNIC prefixes after maximum aggregation: 2156
AfriNIC Deaggregation factor: 4.14
Prefixes being announced from the AfriNIC address blocks: 6973
Unique aggregates announced from the AfriNIC address blocks: 2222
AfriNIC Region origin ASes present in the Internet Routing Table: 534
AfriNIC Prefixes per ASN: 13.06
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 119
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: 31800064
Equivalent to 1 /8s, 229 /16s and 59 /24s
Percentage of available AfriNIC address space announced: 47.4

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 1915 11105 694 Korea Telecom (KIX)
17974 1745 508 72 PT Telekomunikasi Indonesia
7545 1659 301 88 TPG Internet Pty Ltd
4755 1552 384 153 TATA Communications formerly
9829 1262 1069 30 National Internet Backbone
9583 1150 85 495 Sify Limited
7552 1100 1062 11 Vietel Corporation
24560 1024 385 167 Bharti Airtel Ltd., Telemedia
9498 956 291 66 BHARTI Airtel Ltd.
4808 955 1938 286 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 3424 3807 193 BellSouth.net Inc.
7029 3405 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications Co.
1785 1909 681 130 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1595 1060 384 tw telecom holdings, inc.
22773 1581 2910 114 Cox Communications Inc.
30036 1421 261 767 Mediacom Communications Corp
7018 1253 9807 824 AT&T Services, Inc.
11492 1186 216 364 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 1529 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
34984 683 188 173 BILISIM TELEKOM
31148 682 37 9 FreeNet ISP
6830 655 2215 426 UPC Broadband
12479 646 668 66 France Telecom Espana SA
20940 628 207 501 Akamai Technologies European
9116 541 326 32 Goldenlines main autonomous s
3320 531 8441 397 Deutsche Telekom AG
8551 504 360 80 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 1853 332 181 Types of queries are: POCs, o
28573 1815 1114 62 Types of queries are: POCs, o
6503 1522 418 66 Axtel, S.A.B. de C.V.
7303 1362 829 187 Telecom Argentina S.A.
8151 1337 2981 335 Uninet S.A. de C.V.
26615 904 761 33 Tim Celular S.A.
27947 662 74 98 Telconet S.A
11172 641 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 575 242 100 Types of queries are: POCs, o

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 1308 958 13 TEDATA
24863 840 274 32 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 195 12 24 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 164 666 86 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 3424 3807 193 BellSouth.net Inc.
7029 3405 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications Co.
4766 1915 11105 694 Korea Telecom (KIX)
1785 1909 681 130 PaeTec Communications, Inc.
10620 1853 332 181 Types of queries are: POCs, o
28573 1815 1114 62 Types of queries are: POCs, o
17974 1745 508 72 PT Telekomunikasi Indonesia
7545 1659 301 88 TPG Internet Pty Ltd
20115 1639 1566 619 Charter Communications

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 3405 3235 Windstream Communications Inc
18566 2092 1913 Covad Communications Co.
1785 1909 1779 PaeTec Communications, Inc.
28573 1815 1753 Types of queries are: POCs, o
17974 1745 1673 PT Telekomunikasi Indonesia
10620 1853 1672 Types of queries are: POCs, o
7545 1659 1571 TPG Internet Pty Ltd
8402 1529 1513 Corbina telecom
22773 1581 1467 Cox Communications Inc.
6503 1522 1456 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.
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.
25639 UNALLOCATED 12.41.169.0/24 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
27.54.144.0/24 45774 Chandra Net Pvt. Limited, Ind
27.54.151.0/24 45774 Chandra Net Pvt. Limited, Ind

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 /10:29 /11:81 /12:235
/13:461 /14:830 /15:1488 /16:12184 /17:6220 /18:10457
/19:20631 /20:28879 /21:29756 /22:40093 /23:37691 /24:210742
/25:11 /26:21 /27:19 /28:152 /29:151 /30:73
/31:0 /32:137

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

ASN No of nets Total ann. Description
7029 3045 3405 Windstream Communications Inc
6389 2141 3424 BellSouth.net Inc.
18566 2041 2092 Covad Communications Co.
10620 1712 1853 Types of queries are: POCs, o
8402 1507 1529 Corbina telecom
30036 1365 1421 Mediacom Communications Corp
6503 1281 1522 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1109 1308 TEDATA
1785 1072 1909 PaeTec Communications, Inc.

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

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

1:537 2:529 4:14 5:1 6:3 8:405
12:1964 13:1 14:603 15:12 16:3 17:5
20:23 23:166 24:1758 27:1254 31:976 32:52
33:2 34:2 36:8 37:423 38:791 40:120
41:3108 42:134 44:3 46:1484 47:3 49:409
50:539 52:13 54:10 55:10 56:3 57:27
58:919 59:485 60:248 61:1100 62:979 63:2002
64:4168 65:2252 66:4466 67:2017 68:1163 69:3174
70:901 71:484 72:1827 74:2613 75:494 76:318
77:943 78:957 79:483 80:1207 81:904 82:676
83:548 84:482 85:1198 86:418 87:931 88:340
89:1590 90:291 91:4755 92:520 93:1502 94:1500
95:891 96:353 97:315 98:894 99:34 100:7
101:181 103:1001 106:102 107:191 108:253 109:1312
110:742 111:903 112:444 113:583 114:638 115:807
116:906 117:699 118:907 119:1184 120:345 121:671
122:1635 123:1100 124:1315 125:1242 128:520 129:188
130:249 131:616 132:170 133:22 134:235 135:62
136:212 137:174 138:356 139:161 140:458 141:242
142:389 143:388 144:516 145:74 146:494 147:279
148:745 149:305 150:151 151:180 152:462 153:172
154:11 155:416 156:211 157:326 158:173 159:470
160:337 161:236 162:345 163:181 164:577 165:401
166:572 167:467 168:814 169:127 170:861 171:127
172:2 173:1760 174:579 175:426 176:682 177:667
178:1357 180:1190 181:82 182:801 183:290 184:463
185:1 186:2241 187:1055 188:1227 189:1787 190:5501
192:5973 193:5548 194:4654 195:3591 196:1258 197:134
198:3605 199:4497 200:5719 201:1932 202:8237 203:8506
204:4252 205:2481 206:2657 207:2727 208:4049 209:3602
210:2661 211:1456 212:2010 213:1926 214:843 215:103
216:5109 217:1522 218:529 219:313 220:1226 221:538
222:296 223:300

End of report
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