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 16, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Thu 17 May, 2012

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

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

BGP routing table entries examined: 401057
Prefixes after maximum aggregation: 171683
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199291
Total ASes present in the Internet Routing Table: 38521
Prefixes per ASN: 10.41
Origin-only ASes present in the Internet Routing Table: 33228
Origin ASes announcing only one prefix: 15680
Transit ASes present in the Internet Routing Table: 5293
Transit-only ASes present in the Internet Routing Table: 113
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: 1167
Unregistered ASNs in the Routing Table: 230
Number of 32-bit ASNs allocated by the RIRs: 2699
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5921
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 111
Number of addresses announced to Internet: 2570953984
Equivalent to 153 /8s, 61 /16s and 165 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.4
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: 170020

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

Prefixes being announced by APNIC Region ASes: 94304
Total APNIC prefixes after maximum aggregation: 30944
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91795
Unique aggregates announced from the APNIC address blocks: 40000
APNIC Region origin ASes present in the Internet Routing Table: 4647
APNIC Prefixes per ASN: 19.75
APNIC Region origin ASes announcing only one prefix: 1267
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: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 644677632
Equivalent to 38 /8s, 109 /16s and 0 /24s
Percentage of available APNIC address space announced: 81.8

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: 149743
Total ARIN prefixes after maximum aggregation: 76195
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120738
Unique aggregates announced from the ARIN address blocks: 50870
ARIN Region origin ASes present in the Internet Routing Table: 15054
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5741
ARIN Region transit ASes present in the Internet Routing Table: 1519
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: 812154368
Equivalent to 48 /8s, 104 /16s and 126 /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: 100642
Total RIPE prefixes after maximum aggregation: 54173
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 92875
Unique aggregates announced from the RIPE address blocks: 58782
RIPE Region origin ASes present in the Internet Routing Table: 16548
RIPE Prefixes per ASN: 5.61
RIPE Region origin ASes announcing only one prefix: 8057
RIPE Region transit ASes present in the Internet Routing Table: 2594
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: 513191680
Equivalent to 30 /8s, 150 /16s and 175 /24s
Percentage of available RIPE address space announced: 82.7

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: 40588
Total LACNIC prefixes after maximum aggregation: 8146
LACNIC Deaggregation factor: 4.98
Prefixes being announced from the LACNIC address blocks: 40801
Unique aggregates announced from the LACNIC address blocks: 20468
LACNIC Region origin ASes present in the Internet Routing Table: 1583
LACNIC Prefixes per ASN: 25.77
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 286
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 100321024
Equivalent to 5 /8s, 250 /16s and 199 /24s
Percentage of available LACNIC address space announced: 66.4

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: 9021
Total AfriNIC prefixes after maximum aggregation: 2160
AfriNIC Deaggregation factor: 4.18
Prefixes being announced from the AfriNIC address blocks: 7076
Unique aggregates announced from the AfriNIC address blocks: 2191
AfriNIC Region origin ASes present in the Internet Routing Table: 539
AfriNIC Prefixes per ASN: 13.13
AfriNIC Region origin ASes announcing only one prefix: 173
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: 31759872
Equivalent to 1 /8s, 228 /16s and 158 /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 1979 11107 728 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1659 301 86 TPG Internet Pty Ltd
4755 1552 384 152 TATA Communications formerly
9829 1295 1085 28 National Internet Backbone
9583 1157 87 501 Sify Limited
7552 1128 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 966 291 64 BHARTI Airtel Ltd.
18101 947 131 155 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 3415 3807 194 BellSouth.net Inc.
7029 3385 1016 170 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1904 680 130 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1606 2911 121 Cox Communications Inc.
4323 1579 1058 382 tw telecom holdings, inc.
30036 1417 263 752 Mediacom Communications Corp
7018 1226 10055 824 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 1612 544 16 Corbina telecom
34984 695 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 675 671 69 France Telecom Espana SA
6830 655 2215 426 UPC Broadband
20940 643 215 509 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 492 360 80 Bezeq International
3320 485 8442 401 Deutsche Telekom AG
3292 471 2108 406 TDC Data Networks

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 1872 335 176 Types of queries are: POCs, o
28573 1852 1153 59 Types of queries are: POCs, o
6503 1517 418 67 Axtel, S.A.B. de C.V.
7303 1370 837 191 Telecom Argentina S.A.
8151 1335 2995 337 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 666 73 95 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
3816 582 244 99 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 1308 957 12 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
3741 262 905 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
24835 179 80 8 RAYA Telecom - Egypt
15706 164 32 6 Sudatel Internet Exchange Aut
16637 161 666 86 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 3415 3807 194 BellSouth.net Inc.
7029 3385 1016 170 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1979 11107 728 Korea Telecom (KIX)
1785 1904 680 130 PaeTec Communications, Inc.
10620 1872 335 176 Types of queries are: POCs, o
28573 1852 1153 59 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1659 301 86 TPG Internet Pty Ltd
20115 1637 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 3385 3215 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
28573 1852 1793 Types of queries are: POCs, o
1785 1904 1774 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1872 1696 Types of queries are: POCs, o
8402 1612 1596 Corbina telecom
7545 1659 1573 TPG Internet Pty Ltd
22773 1606 1485 Cox Communications Inc.
6503 1517 1450 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
5.35.176.0/21 49820 Pictura Database Publishing B
5.39.0.0/17 16276 AS for Ovh
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

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 /14:829 /15:1491 /16:12198 /17:6215 /18:10481
/19:20698 /20:29223 /21:30276 /22:39596 /23:37932 /24:210706
/25:11 /26:21 /27:20 /28:154 /29:149 /30:78
/31:0 /32:140

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

ASN No of nets Total ann. Description
7029 3026 3385 Windstream Communications Inc
6389 2133 3415 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1716 1872 Types of queries are: POCs, o
8402 1590 1612 Corbina telecom
30036 1358 1417 Mediacom Communications Corp
6503 1274 1517 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1110 1308 TEDATA
7011 1070 1185 Frontier Communications of Am

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

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

1:539 2:665 4:14 5:10 6:3 8:412
12:1961 13:1 14:605 15:12 16:3 17:5
20:23 23:167 24:1766 27:1302 31:977 32:52
33:2 34:2 36:8 37:473 38:804 40:121
41:3121 42:136 44:3 46:1426 47:3 49:401
50:545 52:13 54:10 55:9 56:3 57:27
58:910 59:477 60:247 61:1120 62:989 63:2047
64:4177 65:2245 66:4460 67:2009 68:1167 69:3200
70:905 71:489 72:1823 74:2600 75:493 76:325
77:931 78:978 79:486 80:1207 81:909 82:671
83:552 84:488 85:1177 86:445 87:877 88:334
89:1710 90:290 91:4838 92:544 93:1287 94:1520
95:1155 96:362 97:316 98:878 99:35 100:7
101:182 103:1049 106:103 107:187 108:270 109:1327
110:751 111:913 112:398 113:584 114:611 115:821
116:911 117:696 118:907 119:1193 120:347 121:670
122:1627 123:1100 124:1318 125:1250 128:523 129:190
130:245 131:627 132:172 133:22 134:238 135:62
136:212 137:175 138:359 139:182 140:466 141:243
142:395 143:456 144:521 145:70 146:499 147:293
148:747 149:303 150:183 151:176 152:467 153:172
154:11 155:420 156:218 157:337 158:183 159:476
160:338 161:237 162:341 163:180 164:584 165:391
166:568 167:469 168:857 169:125 170:869 171:130
172:4 173:1741 174:573 175:421 176:580 177:744
178:1372 180:1198 181:82 182:979 183:294 184:488
185:1 186:2302 187:1080 188:1274 189:1790 190:5481
192:5959 193:5304 194:3807 195:3208 196:1259 197:137
198:3607 199:4580 200:5715 201:1931 202:8297 203:8480
204:4255 205:2508 206:2679 207:2727 208:4057 209:3613
210:2671 211:1491 212:2013 213:1941 214:869 215:103
216:5072 217:1544 218:530 219:308 220:1226 221:540
222:295 223:325

End of report
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