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.

Sunday, May 6, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 07 May, 2012

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

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

BGP routing table entries examined: 400007
Prefixes after maximum aggregation: 171145
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198447
Total ASes present in the Internet Routing Table: 38449
Prefixes per ASN: 10.40
Origin-only ASes present in the Internet Routing Table: 33146
Origin ASes announcing only one prefix: 15648
Transit ASes present in the Internet Routing Table: 5303
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: 1207
Unregistered ASNs in the Routing Table: 220
Number of 32-bit ASNs allocated by the RIRs: 2669
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5702
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 110
Number of addresses announced to Internet: 2566177024
Equivalent to 152 /8s, 244 /16s and 193 /24s
Percentage of available address space announced: 69.2
Percentage of allocated address space announced: 69.3
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: 169533

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

Prefixes being announced by APNIC Region ASes: 94037
Total APNIC prefixes after maximum aggregation: 30831
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91506
Unique aggregates announced from the APNIC address blocks: 39866
APNIC Region origin ASes present in the Internet Routing Table: 4634
APNIC Prefixes per ASN: 19.75
APNIC Region origin ASes announcing only one prefix: 1259
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: 644186112
Equivalent to 38 /8s, 101 /16s and 128 /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: 149207
Total ARIN prefixes after maximum aggregation: 76009
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120462
Unique aggregates announced from the ARIN address blocks: 50612
ARIN Region origin ASes present in the Internet Routing Table: 15019
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5732
ARIN Region transit ASes present in the Internet Routing Table: 1511
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: 810096384
Equivalent to 48 /8s, 73 /16s and 23 /24s
Percentage of available ARIN address space announced: 64.6

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: 100811
Total RIPE prefixes after maximum aggregation: 53934
RIPE Deaggregation factor: 1.87
Prefixes being announced from the RIPE address blocks: 92844
Unique aggregates announced from the RIPE address blocks: 58491
RIPE Region origin ASes present in the Internet Routing Table: 16529
RIPE Prefixes per ASN: 5.62
RIPE Region origin ASes announcing only one prefix: 8048
RIPE Region transit ASes present in the Internet Routing Table: 2603
Average RIPE Region AS path length visible: 3.6
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: 511787008
Equivalent to 30 /8s, 129 /16s and 64 /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: 40548
Total LACNIC prefixes after maximum aggregation: 8165
LACNIC Deaggregation factor: 4.97
Prefixes being announced from the LACNIC address blocks: 40642
Unique aggregates announced from the LACNIC address blocks: 20381
LACNIC Region origin ASes present in the Internet Routing Table: 1582
LACNIC Prefixes per ASN: 25.69
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 291
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: 99984384
Equivalent to 5 /8s, 245 /16s and 164 /24s
Percentage of available LACNIC address space announced: 66.2

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: 8889
Total AfriNIC prefixes after maximum aggregation: 2140
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 6971
Unique aggregates announced from the AfriNIC address blocks: 2219
AfriNIC Region origin ASes present in the Internet Routing Table: 530
AfriNIC Prefixes per ASN: 13.15
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 31800320
Equivalent to 1 /8s, 229 /16s and 60 /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 1937 11105 694 Korea Telecom (KIX)
17974 1777 510 73 PT Telekomunikasi Indonesia
7545 1659 301 87 TPG Internet Pty Ltd
4755 1550 384 152 TATA Communications formerly
9829 1281 1069 30 National Internet Backbone
9583 1150 85 495 Sify Limited
7552 1131 1062 11 Vietel Corporation
24560 1025 385 167 Bharti Airtel Ltd., Telemedia
9498 963 291 65 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 3425 3807 197 BellSouth.net Inc.
7029 3409 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1898 680 129 PaeTec Communications, Inc.
20115 1640 1566 619 Charter Communications
4323 1601 1060 382 tw telecom holdings, inc.
22773 1591 2911 115 Cox Communications Inc.
30036 1423 261 761 Mediacom Communications Corp
7018 1255 14166 823 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 1520 544 16 Corbina telecom
34984 687 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
12479 668 669 68 France Telecom Espana SA
6830 655 2215 426 UPC Broadband
20940 633 210 500 Akamai Technologies European
9116 541 326 32 Goldenlines main autonomous s
3320 533 8441 398 Deutsche Telekom AG
8551 503 360 80 Bezeq International
2578 500 33 7 Demos, Moscow, Russia

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 1855 332 181 Types of queries are: POCs, o
28573 1825 1131 56 Types of queries are: POCs, o
6503 1518 418 69 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1334 2983 334 Uninet S.A. de C.V.
26615 902 741 35 Tim Celular S.A.
27947 663 74 98 Telconet S.A
11172 645 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 577 243 98 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 1309 958 13 TEDATA
24863 841 274 32 LINKdotNET AS number
6713 471 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 197 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
29571 157 15 16 Ci Telecom Autonomous system
36923 157 20 4 Swift Networks Limited

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 3425 3807 197 BellSouth.net Inc.
7029 3409 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1937 11105 694 Korea Telecom (KIX)
1785 1898 680 129 PaeTec Communications, Inc.
10620 1855 332 181 Types of queries are: POCs, o
28573 1825 1131 56 Types of queries are: POCs, o
17974 1777 510 73 PT Telekomunikasi Indonesia
7545 1659 301 87 TPG Internet Pty Ltd
20115 1640 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 3409 3238 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
1785 1898 1769 PaeTec Communications, Inc.
28573 1825 1769 Types of queries are: POCs, o
17974 1777 1704 PT Telekomunikasi Indonesia
10620 1855 1674 Types of queries are: POCs, o
7545 1659 1572 TPG Internet Pty Ltd
8402 1520 1504 Corbina telecom
22773 1591 1476 Cox Communications Inc.
6503 1518 1449 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 /11:82 /12:236
/13:460 /14:829 /15:1492 /16:12187 /17:6211 /18:10480
/19:20637 /20:29085 /21:29797 /22:39993 /23:37724 /24:210174
/25:11 /26:21 /27:20 /28:152 /29:144 /30:74
/31:0 /32:137

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

ASN No of nets Total ann. Description
7029 3048 3409 Windstream Communications Inc
6389 2142 3425 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1710 1855 Types of queries are: POCs, o
8402 1498 1520 Corbina telecom
30036 1367 1423 Mediacom Communications Corp
6503 1274 1518 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1110 1309 TEDATA
7011 1069 1184 Frontier Communications of Am

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

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

1:535 2:529 4:14 6:3 8:406 12:1961
13:1 14:604 15:12 16:3 17:5 20:23
23:161 24:1757 27:1288 31:967 32:52 33:2
34:2 36:8 37:430 38:797 40:118 41:3083
42:136 44:3 46:1416 47:3 49:411 50:543
52:13 54:10 55:9 56:3 57:27 58:911
59:479 60:248 61:1094 62:985 63:2039 64:4158
65:2250 66:4467 67:2032 68:1162 69:3168 70:903
71:485 72:1830 74:2608 75:494 76:316 77:940
78:973 79:489 80:1212 81:908 82:664 83:546
84:479 85:1201 86:424 87:922 88:339 89:1648
90:289 91:4780 92:523 93:1488 94:1506 95:892
96:364 97:316 98:865 99:34 100:7 101:181
103:1016 106:101 107:190 108:261 109:1324 110:745
111:915 112:441 113:589 114:623 115:808 116:906
117:703 118:905 119:1189 120:343 121:668 122:1632
123:1101 124:1318 125:1245 128:521 129:188 130:245
131:617 132:171 133:22 134:235 135:62 136:214
137:172 138:356 139:181 140:467 141:242 142:391
143:424 144:514 145:70 146:495 147:281 148:748
149:305 150:149 151:180 152:463 153:169 154:11
155:417 156:214 157:332 158:177 159:474 160:336
161:236 162:344 163:181 164:581 165:400 166:572
167:467 168:817 169:127 170:861 171:128 172:2
173:1763 174:581 175:423 176:631 177:717 178:1357
180:1200 181:82 182:937 183:292 184:477 185:1
186:2271 187:1065 188:1248 189:1765 190:5550 192:5973
193:5295 194:3965 195:3402 196:1250 197:134 198:3609
199:4542 200:5732 201:1923 202:8287 203:8512 204:4259
205:2485 206:2664 207:2726 208:4039 209:3604 210:2657
211:1455 212:2011 213:1944 214:850 215:102 216:5087
217:1542 218:528 219:315 220:1227 221:539 222:295
223:325

End of report
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