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.

Wednesday, May 23, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Thu 24 May, 2012

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

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

BGP routing table entries examined: 404315
Prefixes after maximum aggregation: 172034
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 200052
Total ASes present in the Internet Routing Table: 38548
Prefixes per ASN: 10.49
Origin-only ASes present in the Internet Routing Table: 33247
Origin ASes announcing only one prefix: 15672
Transit ASes present in the Internet Routing Table: 5301
Transit-only ASes present in the Internet Routing Table: 115
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: 1160
Unregistered ASNs in the Routing Table: 226
Number of 32-bit ASNs allocated by the RIRs: 2733
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6005
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 120
Number of addresses announced to Internet: 2573720320
Equivalent to 153 /8s, 103 /16s and 219 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.5
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.6
Total number of prefixes smaller than registry allocations: 170981

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

Prefixes being announced by APNIC Region ASes: 94612
Total APNIC prefixes after maximum aggregation: 30970
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 92110
Unique aggregates announced from the APNIC address blocks: 40084
APNIC Region origin ASes present in the Internet Routing Table: 4647
APNIC Prefixes per ASN: 19.82
APNIC Region origin ASes announcing only one prefix: 1265
APNIC Region transit ASes present in the Internet Routing Table: 709
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: 645486080
Equivalent to 38 /8s, 121 /16s and 86 /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: 150323
Total ARIN prefixes after maximum aggregation: 76306
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120973
Unique aggregates announced from the ARIN address blocks: 51007
ARIN Region origin ASes present in the Internet Routing Table: 15067
ARIN Prefixes per ASN: 8.03
ARIN Region origin ASes announcing only one prefix: 5745
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: 16
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 812289280
Equivalent to 48 /8s, 106 /16s and 141 /24s
Percentage of available ARIN address space announced: 64.8

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: 102354
Total RIPE prefixes after maximum aggregation: 54383
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94530
Unique aggregates announced from the RIPE address blocks: 59200
RIPE Region origin ASes present in the Internet Routing Table: 16565
RIPE Prefixes per ASN: 5.71
RIPE Region origin ASes announcing only one prefix: 8053
RIPE Region transit ASes present in the Internet Routing Table: 2599
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: 514103552
Equivalent to 30 /8s, 164 /16s and 153 /24s
Percentage of available RIPE address space announced: 82.8

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: 40912
Total LACNIC prefixes after maximum aggregation: 8147
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 41172
Unique aggregates announced from the LACNIC address blocks: 20465
LACNIC Region origin ASes present in the Internet Routing Table: 1582
LACNIC Prefixes per ASN: 26.03
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 297
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: 101312256
Equivalent to 6 /8s, 9 /16s and 231 /24s
Percentage of available LACNIC address space announced: 67.1

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: 9279
Total AfriNIC prefixes after maximum aggregation: 2164
AfriNIC Deaggregation factor: 4.29
Prefixes being announced from the AfriNIC address blocks: 7354
Unique aggregates announced from the AfriNIC address blocks: 2195
AfriNIC Region origin ASes present in the Internet Routing Table: 536
AfriNIC Prefixes per ASN: 13.72
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 120
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: 31723008
Equivalent to 1 /8s, 228 /16s and 14 /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 1981 11105 733 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1665 301 87 TPG Internet Pty Ltd
4755 1554 384 152 TATA Communications formerly
9829 1295 1085 28 National Internet Backbone
9583 1161 87 499 Sify Limited
7552 1128 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 963 291 63 BHARTI Airtel Ltd.
18101 949 131 156 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 3414 3807 194 BellSouth.net Inc.
7029 3371 1016 171 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
1785 1904 680 130 PaeTec Communications, Inc.
20115 1636 1565 619 Charter Communications
22773 1606 2911 121 Cox Communications Inc.
4323 1561 1056 378 tw telecom holdings, inc.
30036 1411 261 753 Mediacom Communications Corp
7018 1230 10063 827 AT&T Services, Inc.
7011 1187 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 1628 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 697 188 172 BILISIM TELEKOM
31148 684 37 9 FreeNet ISP
12479 677 672 66 France Telecom Espana SA
6830 655 2215 426 UPC Broadband
20940 642 215 510 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 492 360 80 Bezeq International
3320 486 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 1911 340 202 Types of queries are: POCs, o
28573 1881 1171 58 Types of queries are: POCs, o
6503 1531 418 68 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1338 3027 335 Uninet S.A. de C.V.
26615 901 756 33 Tim Celular S.A.
27947 665 73 95 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
3816 583 246 94 Types of queries are: POCs, o
22047 582 326 15 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 1367 957 12 TEDATA
24863 843 274 32 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 261 905 222 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 192 12 21 Starcomms Nigeria Limited
15706 164 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 3414 3807 194 BellSouth.net Inc.
7029 3371 1016 171 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
4766 1981 11105 733 Korea Telecom (KIX)
10620 1911 340 202 Types of queries are: POCs, o
1785 1904 680 130 PaeTec Communications, Inc.
28573 1881 1171 58 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1665 301 87 TPG Internet Pty Ltd
20115 1636 1565 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 3371 3200 Windstream Communications Inc
18566 2096 1918 Covad Communications Co.
28573 1881 1823 Types of queries are: POCs, o
1785 1904 1774 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1911 1709 Types of queries are: POCs, o
8402 1628 1612 Corbina telecom
7545 1665 1578 TPG Internet Pty Ltd
22773 1606 1485 Cox Communications Inc.
6503 1531 1463 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
5.43.240.0/21 21191 SeverTransTeleCom Autonomous
5.44.0.0/20 39812 CJSC Radiotelephone AS
5.44.40.0/21 23456 32-bit ASN transition
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

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 /10:30 /11:81 /12:236
/13:460 /14:830 /15:1500 /16:12240 /17:6274 /18:10512
/19:20637 /20:29310 /21:30466 /22:39886 /23:38067 /24:213188
/25:11 /26:21 /27:19 /28:150 /29:148 /30:77
/31:0 /32:140

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

ASN No of nets Total ann. Description
7029 3012 3371 Windstream Communications Inc
6389 2132 3414 BellSouth.net Inc.
18566 2045 2096 Covad Communications Co.
10620 1726 1911 Types of queries are: POCs, o
8402 1606 1628 Corbina telecom
30036 1352 1411 Mediacom Communications Corp
6503 1283 1531 Axtel, S.A.B. de C.V.
8452 1169 1367 TEDATA
11492 1149 1186 CABLE ONE, INC.
7011 1072 1187 Frontier Communications of Am

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

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

1:547 2:701 4:13 5:36 6:3 8:417
12:1972 13:1 14:609 15:12 16:3 17:5
20:23 23:168 24:1768 27:1307 31:1044 32:52
33:2 34:2 36:8 37:624 38:802 40:121
41:3193 42:137 44:3 46:1420 47:3 49:396
50:544 52:13 54:11 55:8 56:3 57:27
58:914 59:477 60:247 61:1123 62:989 63:2033
64:4221 65:2247 66:4468 67:2014 68:1160 69:3197
70:932 71:495 72:1838 74:2626 75:492 76:326
77:943 78:988 79:464 80:1217 81:936 82:667
83:542 84:487 85:1209 86:440 87:909 88:334
89:1710 90:289 91:4847 92:548 93:1345 94:1515
95:1137 96:363 97:313 98:872 99:35 100:7
101:187 103:1073 106:104 107:185 108:288 109:1335
110:755 111:904 112:398 113:585 114:617 115:831
116:914 117:701 118:908 119:1196 120:348 121:675
122:1622 123:1103 124:1314 125:1252 128:511 129:189
130:245 131:626 132:279 133:22 134:239 135:62
136:211 137:238 138:359 139:181 140:467 141:243
142:395 143:544 144:533 145:70 146:502 147:285
148:752 149:296 150:188 151:177 152:466 153:172
154:11 155:418 156:220 157:337 158:186 159:482
160:339 161:241 162:344 163:180 164:599 165:401
166:592 167:465 168:859 169:125 170:873 171:131
172:4 173:1746 174:603 175:423 176:585 177:785
178:1384 180:1198 181:85 182:983 183:302 184:496
185:1 186:2292 187:1092 188:1278 189:1789 190:5509
192:5962 193:5556 194:4527 195:3405 196:1187 197:147
198:3615 199:4596 200:5758 201:1931 202:8325 203:8513
204:4262 205:2526 206:2676 207:2731 208:4073 209:3600
210:2685 211:1500 212:2029 213:1942 214:844 215:102
216:5079 217:1540 218:536 219:307 220:1233 221:539
222:296 223:347

End of report
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