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, February 19, 2011

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sun 20 Feb, 2011

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

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

BGP routing table entries examined: 342315
Prefixes after maximum aggregation: 155747
Deaggregation factor: 2.20
Unique aggregates announced to Internet: 171351
Total ASes present in the Internet Routing Table: 35734
Prefixes per ASN: 9.58
Origin-only ASes present in the Internet Routing Table: 30925
Origin ASes announcing only one prefix: 14969
Transit ASes present in the Internet Routing Table: 4809
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: 27
Max AS path prepend of ASN (22394) 24
Prefixes from unregistered ASNs in the Routing Table: 1328
Unregistered ASNs in the Routing Table: 263
Number of 32-bit ASNs allocated by the RIRs: 1133
Prefixes from 32-bit ASNs in the Routing Table: 1742
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 199
Number of addresses announced to Internet: 2413285120
Equivalent to 143 /8s, 215 /16s and 207 /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: 88.0
Total number of prefixes smaller than registry allocations: 140298

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

Prefixes being announced by APNIC Region ASes: 82119
Total APNIC prefixes after maximum aggregation: 28015
APNIC Deaggregation factor: 2.93
Prefixes being announced from the APNIC address blocks: 79774
Unique aggregates announced from the APNIC address blocks: 35830
APNIC Region origin ASes present in the Internet Routing Table: 4279
APNIC Prefixes per ASN: 18.64
APNIC Region origin ASes announcing only one prefix: 1218
APNIC Region transit ASes present in the Internet Routing Table: 655
Average APNIC Region AS path length visible: 4.2
Max APNIC Region AS path length visible: 26
Number of APNIC addresses announced to Internet: 589465344
Equivalent to 35 /8s, 34 /16s and 135 /24s
Percentage of available APNIC address space announced: 74.8

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: 136794
Total ARIN prefixes after maximum aggregation: 69979
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 109666
Unique aggregates announced from the ARIN address blocks: 44949
ARIN Region origin ASes present in the Internet Routing Table: 14107
ARIN Prefixes per ASN: 7.77
ARIN Region origin ASes announcing only one prefix: 5376
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: 27
Number of ARIN addresses announced to Internet: 787307776
Equivalent to 46 /8s, 237 /16s and 93 /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: 82396
Total RIPE prefixes after maximum aggregation: 46587
RIPE Deaggregation factor: 1.77
Prefixes being announced from the RIPE address blocks: 75745
Unique aggregates announced from the RIPE address blocks: 49093
RIPE Region origin ASes present in the Internet Routing Table: 15331
RIPE Prefixes per ASN: 4.94
RIPE Region origin ASes announcing only one prefix: 7801
RIPE Region transit ASes present in the Internet Routing Table: 2369
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 25
Number of RIPE addresses announced to Internet: 460274432
Equivalent to 27 /8s, 111 /16s and 59 /24s
Percentage of available RIPE address space announced: 74.1

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: 31166
Total LACNIC prefixes after maximum aggregation: 7295
LACNIC Deaggregation factor: 4.27
Prefixes being announced from the LACNIC address blocks: 30102
Unique aggregates announced from the LACNIC address blocks: 15929
LACNIC Region origin ASes present in the Internet Routing Table: 1417
LACNIC Prefixes per ASN: 21.24
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 247
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 18
Number of LACNIC addresses announced to Internet: 80777216
Equivalent to 4 /8s, 208 /16s and 144 /24s
Percentage of available LACNIC address space announced: 53.5

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: 7417
Total AfriNIC prefixes after maximum aggregation: 1803
AfriNIC Deaggregation factor: 4.11
Prefixes being announced from the AfriNIC address blocks: 5811
Unique aggregates announced from the AfriNIC address blocks: 1805
AfriNIC Region origin ASes present in the Internet Routing Table: 431
AfriNIC Prefixes per ASN: 13.48
AfriNIC Region origin ASes announcing only one prefix: 132
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: 17
Number of AfriNIC addresses announced to Internet: 21554176
Equivalent to 1 /8s, 72 /16s and 228 /24s
Percentage of available AfriNIC address space announced: 32.1

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 1840 9491 575 Korea Telecom (KIX)
7545 1610 302 86 TPG Internet Pty Ltd
4755 1416 637 163 TATA Communications formerly
17974 1403 467 30 PT Telekomunikasi Indonesia
24560 1111 323 184 Bharti Airtel Ltd., Telemedia
9583 1043 76 487 Sify Limited
17488 950 162 103 Hathway IP Over Cable Interne
4808 939 2034 271 CNCGROUP IP network China169
18101 930 117 141 Reliance Infocom Ltd Internet
9829 897 763 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 3695 3855 262 BellSouth.net Inc.
4323 2623 1125 406 tw telecom holdings, inc.
19262 1843 4955 283 Verizon Online LLC
1785 1787 697 131 PaeTec Communications, Inc.
20115 1527 1534 646 Charter Communications
6478 1518 296 79 AT&T Services, Inc.
18566 1432 319 155 Covad Communications Co.
7018 1384 6708 897 AT&T Services, Inc.
2386 1299 554 936 AT&T Data Communications Serv
11492 1280 236 73 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 511 1764 317 UPC Broadband
9198 468 267 15 Kazakhtelecom Data Network Ad
34984 463 98 143 BILISIM TELEKOM
3292 447 1996 388 TDC Data Networks
8866 440 133 23 Bulgarian Telecommunication C
20940 413 98 319 Akamai Technologies European
3320 409 7620 356 Deutsche Telekom AG
8551 405 355 38 Bezeq International
702 401 1803 314 >>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 1374 255 166 Types of queries are: POCs, o
8151 1210 2663 355 Uninet S.A. de C.V.
28573 1201 958 87 Types of queries are: POCs, o
6503 1156 354 74 Axtel, S.A.B. de C.V.
7303 878 462 130 Telecom Argentina S.A.
14420 638 57 92 CORPORACION NACIONAL DE TELEC
22047 545 310 15 Types of queries are: POCs, o
3816 511 221 96 Types of queries are: POCs, o
7738 478 922 30 Telecomunicacoes da Bahia S.A
14117 476 37 42 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 732 445 11 TEDATA
15475 493 90 12 Nile Online
36992 301 271 14 Etisalat MISR
3741 264 987 226 The Internet Solution
24835 220 78 10 RAYA Telecom - Egypt
6713 205 199 12 Itissalat Al-MAGHRIB
33776 201 12 15 Starcomms Nigeria Limited
29571 192 17 11 Ci Telecom Autonomous system
16637 148 422 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 3695 3855 262 BellSouth.net Inc.
4323 2623 1125 406 tw telecom holdings, inc.
19262 1843 4955 283 Verizon Online LLC
4766 1840 9491 575 Korea Telecom (KIX)
1785 1787 697 131 PaeTec Communications, Inc.
23456 1742 433 980 32-bit ASN transition
7545 1610 302 86 TPG Internet Pty Ltd
20115 1527 1534 646 Charter Communications
6478 1518 296 79 AT&T Services, Inc.
18566 1432 319 155 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 2623 2217 tw telecom holdings, inc.
1785 1787 1656 PaeTec Communications, Inc.
19262 1843 1560 Verizon Online LLC
7545 1610 1524 TPG Internet Pty Ltd
6478 1518 1439 AT&T Services, Inc.
17974 1403 1373 PT Telekomunikasi Indonesia
18566 1432 1277 Covad Communications Co.
4766 1840 1265 Korea Telecom (KIX)
4755 1416 1253 TATA Communications formerly
10620 1374 1208 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
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
/13:444 /14:762 /15:1367 /16:11465 /17:5636 /18:9289
/19:18948 /20:24405 /21:24781 /22:32829 /23:31564 /24:180019
/25:11 /26:17 /27:25 /28:157 /29:96 /30:45
/31:0 /32:109

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

ASN No of nets Total ann. Description
6389 2281 3695 BellSouth.net Inc.
6478 1472 1518 AT&T Services, Inc.
4323 1412 2623 tw telecom holdings, inc.
18566 1410 1432 Covad Communications Co.
10620 1265 1374 Types of queries are: POCs, o
11492 1237 1280 CABLE ONE, INC.
7011 1057 1160 Frontier Communications of Am
1785 1054 1787 PaeTec Communications, Inc.
23456 1002 1742 32-bit ASN transition
19262 954 1843 Verizon Online LLC

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

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

1:198 2:41 4:13 5:1 8:333 12:2013
13:1 14:386 15:15 16:3 17:8 20:9
23:1 24:1487 27:582 32:56 33:4 34:2
37:1 38:698 40:101 41:2225 44:3 46:616
47:4 49:149 50:93 52:12 55:2 56:2
57:28 58:757 59:473 60:389 61:1013 62:1052
63:1932 64:3808 65:2355 66:4237 67:1783 68:1027
69:2928 70:734 71:403 72:2020 73:1 74:2342
75:292 76:347 77:874 78:708 79:447 80:1058
81:819 82:526 83:478 84:632 85:1050 86:559
87:762 88:355 89:1573 90:157 91:3517 92:493
93:1041 94:1208 95:768 96:448 97:251 98:825
99:33 101:19 107:3 108:88 109:928 110:481
111:696 112:303 113:364 114:471 115:648 116:914
117:675 118:667 119:1012 120:240 121:676 122:1620
123:1051 124:1269 125:1251 128:213 129:150 130:166
131:564 132:102 133:20 134:213 135:49 136:212
137:143 138:292 139:117 140:470 141:203 142:342
143:377 144:485 145:50 146:430 147:199 148:616
149:264 150:153 151:230 152:295 153:180 154:2
155:349 156:173 157:313 158:129 159:373 160:313
161:200 162:273 163:151 164:486 165:335 166:502
167:421 168:736 169:149 170:749 171:69 172:11
173:1323 174:531 175:317 176:1 177:13 178:752
180:806 182:351 183:247 184:212 186:1008 187:808
188:895 189:1067 190:4385 192:5745 193:4797 194:3497
195:2940 196:1193 197:3 198:3491 199:3792 200:5568
201:1577 202:8047 203:8347 204:4021 205:2311 206:2531
207:3010 208:3892 209:3467 210:2594 211:1332 212:1945
213:1737 214:756 215:62 216:4874 217:1630 218:528
219:375 220:1193 221:436 222:309 223:96

End of report
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