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, February 14, 2011

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Tue 15 Feb, 2011

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

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

BGP routing table entries examined: 341372
Prefixes after maximum aggregation: 155221
Deaggregation factor: 2.20
Unique aggregates announced to Internet: 170961
Total ASes present in the Internet Routing Table: 35705
Prefixes per ASN: 9.56
Origin-only ASes present in the Internet Routing Table: 30892
Origin ASes announcing only one prefix: 14966
Transit ASes present in the Internet Routing Table: 4813
Transit-only ASes present in the Internet Routing Table: 109
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 26
Max AS path prepend of ASN (22394) 20
Prefixes from unregistered ASNs in the Routing Table: 1338
Unregistered ASNs in the Routing Table: 263
Number of 32-bit ASNs allocated by the RIRs: 1117
Prefixes from 32-bit ASNs in the Routing Table: 1678
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 190
Number of addresses announced to Internet: 2411140608
Equivalent to 143 /8s, 183 /16s and 22 /24s
Percentage of available address space announced: 65.1
Percentage of allocated address space announced: 65.1
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 87.9
Total number of prefixes smaller than registry allocations: 139745

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

Prefixes being announced by APNIC Region ASes: 82003
Total APNIC prefixes after maximum aggregation: 27865
APNIC Deaggregation factor: 2.94
Prefixes being announced from the APNIC address blocks: 79615
Unique aggregates announced from the APNIC address blocks: 35719
APNIC Region origin ASes present in the Internet Routing Table: 4270
APNIC Prefixes per ASN: 18.65
APNIC Region origin ASes announcing only one prefix: 1218
APNIC Region transit ASes present in the Internet Routing Table: 659
Average APNIC Region AS path length visible: 4.2
Max APNIC Region AS path length visible: 26
Number of APNIC addresses announced to Internet: 588894720
Equivalent to 35 /8s, 25 /16s and 210 /24s
Percentage of available APNIC address space announced: 74.7

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: 136363
Total ARIN prefixes after maximum aggregation: 69841
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 109260
Unique aggregates announced from the ARIN address blocks: 44877
ARIN Region origin ASes present in the Internet Routing Table: 14123
ARIN Prefixes per ASN: 7.74
ARIN Region origin ASes announcing only one prefix: 5394
ARIN Region transit ASes present in the Internet Routing Table: 1388
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 23
Number of ARIN addresses announced to Internet: 786583296
Equivalent to 46 /8s, 226 /16s and 79 /24s
Percentage of available ARIN address space announced: 62.5

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: 82171
Total RIPE prefixes after maximum aggregation: 46430
RIPE Deaggregation factor: 1.77
Prefixes being announced from the RIPE address blocks: 75528
Unique aggregates announced from the RIPE address blocks: 48868
RIPE Region origin ASes present in the Internet Routing Table: 15294
RIPE Prefixes per ASN: 4.94
RIPE Region origin ASes announcing only one prefix: 7781
RIPE Region transit ASes present in the Internet Routing Table: 2363
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 25
Number of RIPE addresses announced to Internet: 459387392
Equivalent to 27 /8s, 97 /16s and 178 /24s
Percentage of available RIPE address space announced: 74.0

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: 31103
Total LACNIC prefixes after maximum aggregation: 7276
LACNIC Deaggregation factor: 4.27
Prefixes being announced from the LACNIC address blocks: 30030
Unique aggregates announced from the LACNIC address blocks: 15944
LACNIC Region origin ASes present in the Internet Routing Table: 1416
LACNIC Prefixes per ASN: 21.21
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 248
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 18
Number of LACNIC addresses announced to Internet: 80652032
Equivalent to 4 /8s, 206 /16s and 167 /24s
Percentage of available LACNIC address space announced: 53.4

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: 7367
Total AfriNIC prefixes after maximum aggregation: 1803
AfriNIC Deaggregation factor: 4.09
Prefixes being announced from the AfriNIC address blocks: 5769
Unique aggregates announced from the AfriNIC address blocks: 1829
AfriNIC Region origin ASes present in the Internet Routing Table: 433
AfriNIC Prefixes per ASN: 13.32
AfriNIC Region origin ASes announcing only one prefix: 131
AfriNIC Region transit ASes present in the Internet Routing Table: 93
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 15
Number of AfriNIC addresses announced to Internet: 21840128
Equivalent to 1 /8s, 77 /16s and 65 /24s
Percentage of available AfriNIC address space announced: 32.5

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 1793 9486 535 Korea Telecom (KIX)
7545 1625 301 84 TPG Internet Pty Ltd
4755 1413 637 163 TATA Communications formerly
17974 1405 459 29 PT Telekomunikasi Indonesia
24560 1109 323 181 Bharti Airtel Ltd., Telemedia
9583 1043 77 488 Sify Limited
17488 952 162 104 Hathway IP Over Cable Interne
4808 939 2034 271 CNCGROUP IP network China169
18101 927 117 142 Reliance Infocom Ltd Internet
9829 898 763 42 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 3699 3855 263 BellSouth.net Inc.
4323 2625 1125 405 tw telecom holdings, inc.
19262 1842 4951 283 Verizon Online LLC
1785 1787 697 131 PaeTec Communications, Inc.
20115 1528 1534 646 Charter Communications
6478 1508 295 87 AT&T Services, Inc.
7018 1370 6708 889 AT&T Services, Inc.
2386 1299 554 936 AT&T Data Communications Serv
18566 1279 310 103 Covad Communications Co.
22773 1275 2865 78 Cox Communications 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 509 1764 315 UPC Broadband
9198 464 266 14 Kazakhtelecom Data Network Ad
34984 456 97 137 BILISIM TELEKOM
3292 445 1996 387 TDC Data Networks
8866 439 133 22 Bulgarian Telecommunication C
20940 408 95 315 Akamai Technologies European
8551 405 355 38 Bezeq International
3320 403 7617 352 Deutsche Telekom AG
702 400 1803 313 >>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 1373 255 166 Types of queries are: POCs, o
28573 1213 961 82 Types of queries are: POCs, o
8151 1209 2645 356 Uninet S.A. de C.V.
6503 1174 354 74 Axtel, S.A.B. de C.V.
7303 868 447 129 Telecom Argentina S.A.
14420 639 57 93 CORPORACION NACIONAL DE TELEC
22047 543 310 15 Types of queries are: POCs, o
3816 507 220 94 Types of queries are: POCs, o
7738 478 922 30 Telecomunicacoes da Bahia S.A
14117 462 35 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
24863 760 147 37 LINKdotNET AS number
8452 746 445 11 TEDATA
36992 589 305 17 Etisalat MISR
3741 264 987 226 The Internet Solution
24835 219 78 10 RAYA Telecom - Egypt
6713 205 199 12 Itissalat Al-MAGHRIB
33776 194 12 15 Starcomms Nigeria Limited
15475 193 56 9 Nile Online
29571 193 19 11 Ci Telecom Autonomous system
16637 148 422 84 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 3699 3855 263 BellSouth.net Inc.
4323 2625 1125 405 tw telecom holdings, inc.
19262 1842 4951 283 Verizon Online LLC
4766 1793 9486 535 Korea Telecom (KIX)
1785 1787 697 131 PaeTec Communications, Inc.
23456 1678 422 948 32-bit ASN transition
7545 1625 301 84 TPG Internet Pty Ltd
20115 1528 1534 646 Charter Communications
6478 1508 295 87 AT&T Services, Inc.
4755 1413 637 163 TATA Communications formerly

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 2625 2220 tw telecom holdings, inc.
1785 1787 1656 PaeTec Communications, Inc.
19262 1842 1559 Verizon Online LLC
7545 1625 1541 TPG Internet Pty Ltd
6478 1508 1421 AT&T Services, Inc.
17974 1405 1376 PT Telekomunikasi Indonesia
4766 1793 1258 Korea Telecom (KIX)
4755 1413 1250 TATA Communications formerly
10620 1373 1207 Types of queries are: POCs, o
22773 1275 1197 Cox Communications 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 *
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
5.0.0.0/16 12654 RIPE NCC RIS Project
5.1.0.0/21 12654 RIPE NCC RIS Project
5.1.24.0/24 12654 RIPE NCC RIS Project
24.129.192.0/19 7922 Comcast Cable Communications,
37.0.0.0/16 12654 RIPE NCC RIS Project
37.1.0.0/21 12654 RIPE NCC RIS Project
37.1.24.0/24 12654 RIPE NCC RIS Project
39.0.0.0/8 237 Merit Network Inc.
41.57.192.0/18 22750 BCSNET
41.222.79.0/24 36938 >>UNKNOWN<<

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 /8:22 /9:10 /10:26 /11:72 /12:216
/13:443 /14:763 /15:1363 /16:11457 /17:5625 /18:9274
/19:18914 /20:24330 /21:24704 /22:32751 /23:31490 /24:179450
/25:11 /26:17 /27:25 /28:156 /29:94 /30:45
/31:0 /32:114

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

ASN No of nets Total ann. Description
6389 2280 3699 BellSouth.net Inc.
6478 1462 1508 AT&T Services, Inc.
4323 1413 2625 tw telecom holdings, inc.
10620 1264 1373 Types of queries are: POCs, o
18566 1257 1279 Covad Communications Co.
11492 1226 1269 CABLE ONE, INC.
7011 1060 1163 Frontier Communications of Am
1785 1054 1787 PaeTec Communications, Inc.
23456 986 1678 32-bit ASN transition
6503 956 1174 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)
----------------------------------------------

1:182 2:42 4:13 5:1 8:332 12:2029
13:1 14:390 15:15 16:3 17:8 20:9
23:1 24:1478 27:577 32:56 33:5 34:2
37:1 38:699 40:101 41:2263 44:3 46:601
47:4 49:147 50:90 52:12 55:5 56:2
57:29 58:749 59:475 60:389 61:1017 62:1069
63:1938 64:3759 65:2358 66:4154 67:1764 68:1026
69:2905 70:737 71:400 72:2009 73:1 74:2320
75:292 76:346 77:864 78:705 79:448 80:1046
81:820 82:528 83:475 84:651 85:1057 86:557
87:761 88:355 89:1572 90:156 91:3469 92:496
93:1044 94:1199 95:758 96:417 97:251 98:791
99:33 101:27 107:3 108:88 109:957 110:471
111:692 112:304 113:352 114:479 115:647 116:918
117:670 118:657 119:1011 120:237 121:679 122:1631
123:1060 124:1259 125:1226 128:212 129:147 130:166
131:565 132:102 133:20 134:211 135:49 136:212
137:144 138:291 139:116 140:470 141:203 142:342
143:384 144:483 145:51 146:426 147:203 148:618
149:273 150:154 151:230 152:303 153:179 154:2
155:350 156:173 157:312 158:129 159:373 160:314
161:197 162:273 163:148 164:486 165:337 166:500
167:421 168:737 169:148 170:748 171:69 172:2
173:1300 174:517 175:314 176:1 177:6 178:787
180:794 182:343 183:247 184:211 186:1011 187:821
188:867 189:1039 190:4343 192:5753 193:4787 194:3491
195:2930 196:1181 197:3 198:3493 199:3798 200:5526
201:1572 202:8048 203:8345 204:4023 205:2317 206:2534
207:3006 208:3898 209:3469 210:2604 211:1329 212:1894
213:1729 214:766 215:62 216:4862 217:1593 218:522
219:374 220:1195 221:433 222:315 223:94

End of report
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