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.

Friday, April 6, 2012

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 397825
Prefixes after maximum aggregation: 169859
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 196198
Total ASes present in the Internet Routing Table: 38285
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 33009
Origin ASes announcing only one prefix: 15488
Transit ASes present in the Internet Routing Table: 5276
Transit-only ASes present in the Internet Routing Table: 124
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 24
Max AS path prepend of ASN (36992) 22
Prefixes from unregistered ASNs in the Routing Table: 1474
Unregistered ASNs in the Routing Table: 387
Number of 32-bit ASNs allocated by the RIRs: 2347
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5346
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 1415
Number of addresses announced to Internet: 2551449088
Equivalent to 152 /8s, 20 /16s and 6 /24s
Percentage of available address space announced: 68.8
Percentage of allocated address space announced: 68.8
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 92.1
Total number of prefixes smaller than registry allocations: 167673

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

Prefixes being announced by APNIC Region ASes: 93316
Total APNIC prefixes after maximum aggregation: 30735
APNIC Deaggregation factor: 3.04
Prefixes being announced from the APNIC address blocks: 90728
Unique aggregates announced from the APNIC address blocks: 39377
APNIC Region origin ASes present in the Internet Routing Table: 4633
APNIC Prefixes per ASN: 19.58
APNIC Region origin ASes announcing only one prefix: 1265
APNIC Region transit ASes present in the Internet Routing Table: 704
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 16
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 642811136
Equivalent to 38 /8s, 80 /16s and 133 /24s
Percentage of available APNIC address space announced: 81.5

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: 148159
Total ARIN prefixes after maximum aggregation: 75343
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 119735
Unique aggregates announced from the ARIN address blocks: 49960
ARIN Region origin ASes present in the Internet Routing Table: 14883
ARIN Prefixes per ASN: 8.05
ARIN Region origin ASes announcing only one prefix: 5676
ARIN Region transit ASes present in the Internet Routing Table: 1502
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: 805811456
Equivalent to 48 /8s, 7 /16s and 181 /24s
Percentage of available ARIN address space announced: 64.0

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: 101278
Total RIPE prefixes after maximum aggregation: 53279
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 92526
Unique aggregates announced from the RIPE address blocks: 57217
RIPE Region origin ASes present in the Internet Routing Table: 16349
RIPE Prefixes per ASN: 5.66
RIPE Region origin ASes announcing only one prefix: 7952
RIPE Region transit ASes present in the Internet Routing Table: 2592
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 24
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 502255616
Equivalent to 29 /8s, 239 /16s and 208 /24s
Percentage of available RIPE address space announced: 80.9

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: 39708
Total LACNIC prefixes after maximum aggregation: 8102
LACNIC Deaggregation factor: 4.90
Prefixes being announced from the LACNIC address blocks: 39455
Unique aggregates announced from the LACNIC address blocks: 19797
LACNIC Region origin ASes present in the Internet Routing Table: 1558
LACNIC Prefixes per ASN: 25.32
LACNIC Region origin ASes announcing only one prefix: 432
LACNIC Region transit ASes present in the Internet Routing Table: 286
Average LACNIC Region AS path length visible: 3.9
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: 98683648
Equivalent to 5 /8s, 225 /16s and 203 /24s
Percentage of available LACNIC address space announced: 65.4

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: 8923
Total AfriNIC prefixes after maximum aggregation: 2114
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 6995
Unique aggregates announced from the AfriNIC address blocks: 2158
AfriNIC Region origin ASes present in the Internet Routing Table: 525
AfriNIC Prefixes per ASN: 13.32
AfriNIC Region origin ASes announcing only one prefix: 163
AfriNIC Region transit ASes present in the Internet Routing Table: 115
Average AfriNIC Region AS path length visible: 3.5
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: 31531008
Equivalent to 1 /8s, 225 /16s and 32 /24s
Percentage of available AfriNIC address space announced: 47.0

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 1913 11107 684 Korea Telecom (KIX)
17974 1702 503 63 PT Telekomunikasi Indonesia
7545 1651 301 85 TPG Internet Pty Ltd
4755 1556 385 156 TATA Communications formerly
9829 1235 1041 30 National Internet Backbone
9583 1234 94 539 Sify Limited
7552 1106 1062 11 Vietel Corporation
24560 1019 385 167 Bharti Airtel Ltd., Telemedia
4808 989 1947 284 CNCGROUP IP network China169
18101 948 131 159 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 3433 3807 197 BellSouth.net Inc.
7029 3416 1016 169 Windstream Communications Inc
18566 2093 383 179 Covad Communications Co.
1785 1895 680 128 PaeTec Communications, Inc.
20115 1637 1561 617 Charter Communications
4323 1594 1059 380 tw telecom holdings, inc.
22773 1567 2910 111 Cox Communications Inc.
30036 1460 265 741 Mediacom Communications Corp
7018 1288 9807 837 AT&T Services, Inc.
11492 1184 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 1679 544 16 Corbina telecom
2118 1394 97 14 EUnet/RELCOM Autonomous Syste
31148 679 37 9 FreeNet ISP
34984 676 188 173 BILISIM TELEKOM
12479 652 658 57 France Telecom Espana SA
6830 640 1943 411 UPC Broadband
20940 634 205 499 Akamai Technologies European
9116 541 326 32 Goldenlines main autonomous s
3320 532 8442 398 Deutsche Telekom AG
8551 505 360 81 Bezeq International

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 1795 327 163 Types of queries are: POCs, o
28573 1761 1105 61 Types of queries are: POCs, o
6503 1521 418 65 Axtel, S.A.B. de C.V.
7303 1353 827 189 Telecom Argentina S.A.
8151 1344 2979 348 Uninet S.A. de C.V.
26615 887 697 32 Tim Celular S.A.
27947 661 74 99 Telconet S.A
11172 638 107 74 Alestra, S. de R.L. de C.V.
22047 584 326 15 Types of queries are: POCs, o
3816 573 242 100 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 846 274 32 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 266 921 224 The Internet Solution
33776 208 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
24835 178 80 8 RAYA Telecom - Egypt
15706 168 32 6 Sudatel Internet Exchange Aut
16637 162 666 85 MTN Network Solutions
29571 160 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 3433 3807 197 BellSouth.net Inc.
7029 3416 1016 169 Windstream Communications Inc
18566 2093 383 179 Covad Communications Co.
4766 1913 11107 684 Korea Telecom (KIX)
1785 1895 680 128 PaeTec Communications, Inc.
10620 1795 327 163 Types of queries are: POCs, o
28573 1761 1105 61 Types of queries are: POCs, o
17974 1702 503 63 PT Telekomunikasi Indonesia
8402 1679 544 16 Corbina telecom
7545 1651 301 85 TPG Internet Pty Ltd

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 3416 3247 Windstream Communications Inc
18566 2093 1914 Covad Communications Co.
1785 1895 1767 PaeTec Communications, Inc.
28573 1761 1700 Types of queries are: POCs, o
8402 1679 1663 Corbina telecom
17974 1702 1639 PT Telekomunikasi Indonesia
10620 1795 1632 Types of queries are: POCs, o
7545 1651 1566 TPG Internet Pty Ltd
22773 1567 1456 Cox Communications Inc.
6503 1521 1456 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
54439 UNALLOCATED 8.25.174.0/24 3356 Level 3 Communicatio
54470 UNALLOCATED 8.30.171.0/24 3356 Level 3 Communicatio
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.

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
23.27.0.0/20 54500 EGIHosting
23.27.16.0/20 54500 EGIHosting

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 /10:28 /11:81 /12:236
/13:459 /14:829 /15:1483 /16:12136 /17:6256 /18:10407
/19:20605 /20:28646 /21:29480 /22:39909 /23:37264 /24:209420
/25:11 /26:21 /27:20 /28:152 /29:143 /30:69
/31:0 /32:138

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

ASN No of nets Total ann. Description
7029 3058 3416 Windstream Communications Inc
6389 2149 3433 BellSouth.net Inc.
18566 2042 2093 Covad Communications Co.
10620 1690 1795 Types of queries are: POCs, o
8402 1656 1679 Corbina telecom
30036 1400 1460 Mediacom Communications Corp
6503 1281 1521 Axtel, S.A.B. de C.V.
11492 1147 1184 CABLE ONE, INC.
8452 1118 1309 TEDATA
1785 1067 1895 PaeTec Communications, Inc.

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

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

1:530 2:694 4:14 6:3 8:396 12:1998
13:1 14:592 15:12 16:3 17:7 20:8
23:158 24:1762 27:1262 31:990 32:53 33:2
34:2 36:8 37:319 38:783 40:120 41:3119
42:132 44:3 46:1467 47:3 49:346 50:537
52:13 54:7 55:9 56:3 57:28 58:912
59:486 60:276 61:1093 62:971 63:1993 64:4145
65:2259 66:4487 67:2020 68:1152 69:3170 70:907
71:467 72:1833 74:2599 75:494 76:313 77:964
78:1005 79:494 80:1210 81:899 82:668 83:547
84:489 85:1187 86:412 87:911 88:351 89:1637
90:297 91:4686 92:520 93:1365 94:1477 95:1129
96:374 97:318 98:879 99:37 100:6 101:163
103:936 106:73 107:181 108:200 109:1271 110:740
111:897 112:436 113:574 114:614 115:788 116:885
117:702 118:902 119:1179 120:339 121:673 122:1627
123:1101 124:1297 125:1253 128:521 129:184 130:251
131:593 132:165 133:21 134:233 135:62 136:211
137:173 138:354 139:144 140:468 141:243 142:368
143:394 144:509 145:64 146:476 147:272 148:744
149:298 150:152 151:176 152:460 153:172 154:6
155:445 156:213 157:335 158:175 159:450 160:341
161:232 162:344 163:178 164:567 165:389 166:561
167:464 168:815 169:126 170:844 171:126 172:4
173:1737 174:576 175:417 176:461 177:646 178:1318
180:1167 181:73 182:761 183:276 184:451 185:1
186:2156 187:1028 188:1183 189:1789 190:5441 192:5949
193:5607 194:4592 195:3598 196:1267 197:129 198:3579
199:4433 200:5689 201:1891 202:8220 203:8488 204:4261
205:2461 206:2655 207:2714 208:4056 209:3558 210:2668
211:1451 212:2004 213:1909 214:884 215:107 216:5052
217:1524 218:527 219:319 220:1224 221:536 222:293
223:317

End of report
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