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, April 14, 2011

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 348682
Prefixes after maximum aggregation: 158282
Deaggregation factor: 2.20
Unique aggregates announced to Internet: 174967
Total ASes present in the Internet Routing Table: 36137
Prefixes per ASN: 9.65
Origin-only ASes present in the Internet Routing Table: 31235
Origin ASes announcing only one prefix: 15059
Transit ASes present in the Internet Routing Table: 4902
Transit-only ASes present in the Internet Routing Table: 111
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 30
Max AS path prepend of ASN (16181) 22
Prefixes from unregistered ASNs in the Routing Table: 1933
Unregistered ASNs in the Routing Table: 364
Number of 32-bit ASNs allocated by the RIRs: 1291
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 2189
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 157
Number of addresses announced to Internet: 2428152320
Equivalent to 144 /8s, 186 /16s and 170 /24s
Percentage of available address space announced: 65.5
Percentage of allocated address space announced: 65.5
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 90.5
Total number of prefixes smaller than registry allocations: 143129

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

Prefixes being announced by APNIC Region ASes: 83722
Total APNIC prefixes after maximum aggregation: 28456
APNIC Deaggregation factor: 2.94
Prefixes being announced from the APNIC address blocks: 81500
Unique aggregates announced from the APNIC address blocks: 36974
APNIC Region origin ASes present in the Internet Routing Table: 4351
APNIC Prefixes per ASN: 18.73
APNIC Region origin ASes announcing only one prefix: 1234
APNIC Region transit ASes present in the Internet Routing Table: 664
Average APNIC Region AS path length visible: 4.1
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 607942144
Equivalent to 36 /8s, 60 /16s and 118 /24s
Percentage of available APNIC address space announced: 77.1

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: 138174
Total ARIN prefixes after maximum aggregation: 70487
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 110967
Unique aggregates announced from the ARIN address blocks: 45048
ARIN Region origin ASes present in the Internet Routing Table: 14238
ARIN Prefixes per ASN: 7.79
ARIN Region origin ASes announcing only one prefix: 5462
ARIN Region transit ASes present in the Internet Routing Table: 1414
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 797818368
Equivalent to 47 /8s, 141 /16s and 190 /24s
Percentage of available ARIN address space announced: 63.4

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: 84182
Total RIPE prefixes after maximum aggregation: 47677
RIPE Deaggregation factor: 1.77
Prefixes being announced from the RIPE address blocks: 77270
Unique aggregates announced from the RIPE address blocks: 50708
RIPE Region origin ASes present in the Internet Routing Table: 15511
RIPE Prefixes per ASN: 4.98
RIPE Region origin ASes announcing only one prefix: 7796
RIPE Region transit ASes present in the Internet Routing Table: 2409
Average RIPE Region AS path length visible: 3.6
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 466648320
Equivalent to 27 /8s, 208 /16s and 125 /24s
Percentage of available RIPE address space announced: 75.2

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: 32026
Total LACNIC prefixes after maximum aggregation: 7344
LACNIC Deaggregation factor: 4.36
Prefixes being announced from the LACNIC address blocks: 31136
Unique aggregates announced from the LACNIC address blocks: 16414
LACNIC Region origin ASes present in the Internet Routing Table: 1425
LACNIC Prefixes per ASN: 21.85
LACNIC Region origin ASes announcing only one prefix: 431
LACNIC Region transit ASes present in the Internet Routing Table: 250
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 20
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 81860352
Equivalent to 4 /8s, 225 /16s and 23 /24s
Percentage of available LACNIC address space announced: 54.2

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: 7692
Total AfriNIC prefixes after maximum aggregation: 1830
AfriNIC Deaggregation factor: 4.20
Prefixes being announced from the AfriNIC address blocks: 6040
Unique aggregates announced from the AfriNIC address blocks: 1879
AfriNIC Region origin ASes present in the Internet Routing Table: 445
AfriNIC Prefixes per ASN: 13.57
AfriNIC Region origin ASes announcing only one prefix: 136
AfriNIC Region transit ASes present in the Internet Routing Table: 100
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 17
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 0
Number of AfriNIC addresses announced to Internet: 22800384
Equivalent to 1 /8s, 91 /16s and 232 /24s
Percentage of available AfriNIC address space announced: 34.0

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 1875 9509 604 Korea Telecom (KIX)
7545 1498 300 81 TPG Internet Pty Ltd
17974 1476 472 34 PT Telekomunikasi Indonesia
4755 1445 638 166 TATA Communications formerly
24560 1137 322 203 Bharti Airtel Ltd., Telemedia
9583 1055 77 496 Sify Limited
9829 1008 870 50 National Internet Backbone
4808 949 2028 277 CNCGROUP IP network China169
17488 940 162 98 Hathway IP Over Cable Interne
18101 935 116 139 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
6389 3664 3822 256 BellSouth.net Inc.
4323 2660 1106 397 tw telecom holdings, inc.
1785 1791 681 127 PaeTec Communications, Inc.
18566 1657 335 222 Covad Communications Co.
6478 1623 307 37 AT&T Services, Inc.
20115 1537 1552 641 Charter Communications
19262 1494 4949 297 Verizon Online LLC
7018 1362 6962 891 AT&T Services, Inc.
22773 1297 2865 84 Cox Communications Inc.
2386 1269 536 912 AT&T Data Communications Serv

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 541 326 30 Goldenlines main autonomous s
6830 516 1780 319 UPC Broadband
34984 508 98 185 BILISIM TELEKOM
29049 467 33 34 AzerSat LLC.
3292 455 2013 392 TDC Data Networks
8866 446 134 26 Bulgarian Telecommunication C
20940 440 127 338 Akamai Technologies European
3320 417 7607 363 Deutsche Telekom AG
8551 405 355 38 Bezeq International
12479 405 577 6 France Telecom Espana SA

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 1426 265 157 Types of queries are: POCs, o
28573 1248 972 92 Types of queries are: POCs, o
8151 1233 2667 364 Uninet S.A. de C.V.
6503 923 354 73 Axtel, S.A.B. de C.V.
7303 900 464 136 Telecom Argentina S.A.
14420 661 53 90 CORPORACION NACIONAL DE TELEC
22047 567 310 15 Types of queries are: POCs, o
3816 517 225 97 Types of queries are: POCs, o
11172 485 99 81 Alestra, S. de R.L. de C.V.
14117 483 38 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
8452 836 445 11 TEDATA
24863 775 147 37 LINKdotNET AS number
15475 428 90 8 Nile Online
36992 295 287 12 Etisalat MISR
3741 266 985 227 The Internet Solution
6713 235 215 13 Itissalat Al-MAGHRIB
33776 227 13 5 Starcomms Nigeria Limited
24835 222 78 10 RAYA Telecom - Egypt
29571 161 17 11 Ci Telecom Autonomous system
16637 147 441 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 3664 3822 256 BellSouth.net Inc.
4323 2660 1106 397 tw telecom holdings, inc.
23456 2189 642 1194 32-bit ASN transition
4766 1875 9509 604 Korea Telecom (KIX)
1785 1791 681 127 PaeTec Communications, Inc.
18566 1657 335 222 Covad Communications Co.
6478 1623 307 37 AT&T Services, Inc.
20115 1537 1552 641 Charter Communications
7545 1498 300 81 TPG Internet Pty Ltd
19262 1494 4949 297 Verizon Online LLC

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 2660 2263 tw telecom holdings, inc.
1785 1791 1664 PaeTec Communications, Inc.
6478 1623 1586 AT&T Services, Inc.
17974 1476 1442 PT Telekomunikasi Indonesia
18566 1657 1435 Covad Communications Co.
7545 1498 1417 TPG Internet Pty Ltd
4755 1445 1279 TATA Communications formerly
4766 1875 1271 Korea Telecom (KIX)
10620 1426 1269 Types of queries are: POCs, o
11492 1262 1247 CABLE ONE, 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
45083 UNALLOCATED 1.45.0.0/16 4808 CNCGROUP IP network
45083 UNALLOCATED 1.45.92.0/22 4808 CNCGROUP IP network
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
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.

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 65535 Internet Assigned Numbers Aut
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
2.56.0.0/16 44559 E-Rent LLC
24.225.128.0/18 36377 Comcast Telecommunications, I
24.225.192.0/23 36377 Comcast Telecommunications, I
24.225.192.0/18 36377 Comcast Telecommunications, I
24.225.224.0/21 36377 Comcast Telecommunications, I
24.225.237.0/24 36377 Comcast Telecommunications, I
24.225.248.0/21 36377 Comcast Telecommunications, I
31.7.56.0/21 51852 Private Layer INC
31.7.146.0/23 49360 Rp Engineering di Romano Ales
31.7.168.0/21 48057 Company for interactive techn

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 /10:26 /11:76 /12:219
/13:452 /14:771 /15:1374 /16:11575 /17:5721 /18:9394
/19:19217 /20:25175 /21:25422 /22:33346 /23:32197 /24:183259
/25:10 /26:17 /27:19 /28:147 /29:86 /30:47
/31:0 /32:100

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

ASN No of nets Total ann. Description
6389 2260 3664 BellSouth.net Inc.
18566 1634 1657 Covad Communications Co.
6478 1577 1623 AT&T Services, Inc.
4323 1354 2660 tw telecom holdings, inc.
10620 1316 1426 Types of queries are: POCs, o
11492 1211 1262 CABLE ONE, INC.
23456 1134 2189 32-bit ASN transition
7011 1062 1161 Frontier Communications of Am
1785 1058 1791 PaeTec Communications, Inc.
22773 841 1297 Cox Communications Inc.

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

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

1:253 2:65 4:14 5:1 8:348 12:1988
13:1 14:423 15:15 16:3 17:8 20:9
23:5 24:1603 27:713 31:220 32:55 33:3
34:2 37:1 38:760 40:101 41:2388 42:1
44:3 46:849 47:4 49:170 50:358 52:13
55:5 56:2 57:29 58:796 59:470 60:385
61:1061 62:1007 63:1914 64:3805 65:2308 66:4308
67:1810 68:1075 69:2947 70:699 71:345 72:1893
73:1 74:2335 75:299 76:337 77:838 78:690
79:456 80:1082 81:827 82:501 83:455 84:644
85:1064 86:564 87:769 88:339 89:1584 90:181
91:3706 92:514 93:1055 94:1260 95:785 96:448
97:250 98:816 99:35 101:53 103:1 106:1
107:4 108:80 109:952 110:534 111:686 112:314
113:388 114:505 115:674 116:918 117:655 118:765
119:1129 120:288 121:651 122:1627 123:1046 124:1222
125:1250 128:213 129:159 130:166 131:564 132:104
133:20 134:209 135:49 136:210 137:139 138:301
139:101 140:464 141:174 142:381 143:390 144:481
145:53 146:436 147:204 148:586 149:233 150:163
151:187 152:305 153:180 154:2 155:394 156:187
157:326 158:132 159:374 160:314 161:236 162:275
163:154 164:489 165:347 166:515 167:419 168:720
169:153 170:777 171:75 172:1 173:1492 174:529
175:340 177:71 178:855 180:801 181:7 182:407
183:197 184:243 185:1 186:1132 187:828 188:992
189:1004 190:4814 192:5734 193:4812 194:3455 195:2957
196:1211 197:16 198:3511 199:3882 200:5520 201:1487
202:8115 203:8318 204:4054 205:2304 206:2636 207:2952
208:3936 209:3472 210:2654 211:1353 212:1985 213:1725
214:732 215:67 216:4831 217:1658 218:543 219:382
220:1190 221:456 222:305 223:117

End of report
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