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 9, 2012

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 399828
Prefixes after maximum aggregation: 171344
Deaggregation factor: 2.33
Unique aggregates announced to Internet: 198801
Total ASes present in the Internet Routing Table: 38475
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 33179
Origin ASes announcing only one prefix: 15671
Transit ASes present in the Internet Routing Table: 5296
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: 1158
Unregistered ASNs in the Routing Table: 221
Number of 32-bit ASNs allocated by the RIRs: 2678
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5770
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 113
Number of addresses announced to Internet: 2567389440
Equivalent to 153 /8s, 7 /16s and 65 /24s
Percentage of available address space announced: 69.3
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: 169200

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

Prefixes being announced by APNIC Region ASes: 94448
Total APNIC prefixes after maximum aggregation: 30892
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 91926
Unique aggregates announced from the APNIC address blocks: 39887
APNIC Region origin ASes present in the Internet Routing Table: 4639
APNIC Prefixes per ASN: 19.82
APNIC Region origin ASes announcing only one prefix: 1264
APNIC Region transit ASes present in the Internet Routing Table: 707
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: 644450304
Equivalent to 38 /8s, 105 /16s and 136 /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: 149206
Total ARIN prefixes after maximum aggregation: 76032
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120458
Unique aggregates announced from the ARIN address blocks: 50693
ARIN Region origin ASes present in the Internet Routing Table: 15026
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5739
ARIN Region transit ASes present in the Internet Routing Table: 1513
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: 810152192
Equivalent to 48 /8s, 73 /16s and 241 /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: 100144
Total RIPE prefixes after maximum aggregation: 54074
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92419
Unique aggregates announced from the RIPE address blocks: 58596
RIPE Region origin ASes present in the Internet Routing Table: 16543
RIPE Prefixes per ASN: 5.59
RIPE Region origin ASes announcing only one prefix: 8059
RIPE Region transit ASes present in the Internet Routing Table: 2606
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: 512396544
Equivalent to 30 /8s, 138 /16s and 141 /24s
Percentage of available RIPE address space announced: 82.5

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: 40607
Total LACNIC prefixes after maximum aggregation: 8148
LACNIC Deaggregation factor: 4.98
Prefixes being announced from the LACNIC address blocks: 40723
Unique aggregates announced from the LACNIC address blocks: 20498
LACNIC Region origin ASes present in the Internet Routing Table: 1584
LACNIC Prefixes per ASN: 25.71
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 293
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: 100092928
Equivalent to 5 /8s, 247 /16s and 76 /24s
Percentage of available LACNIC address space announced: 66.3

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: 8832
Total AfriNIC prefixes after maximum aggregation: 2132
AfriNIC Deaggregation factor: 4.14
Prefixes being announced from the AfriNIC address blocks: 6907
Unique aggregates announced from the AfriNIC address blocks: 2204
AfriNIC Region origin ASes present in the Internet Routing Table: 528
AfriNIC Prefixes per ASN: 13.08
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 115
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: 31751168
Equivalent to 1 /8s, 228 /16s and 124 /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 1941 11105 695 Korea Telecom (KIX)
17974 1780 510 73 PT Telekomunikasi Indonesia
7545 1660 301 87 TPG Internet Pty Ltd
4755 1576 386 158 TATA Communications formerly
9829 1277 1069 30 National Internet Backbone
9583 1151 85 495 Sify Limited
7552 1131 1062 11 Vietel Corporation
24560 1025 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 65 BHARTI Airtel Ltd.
4808 951 1938 284 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 3421 3807 195 BellSouth.net Inc.
7029 3410 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1899 680 129 PaeTec Communications, Inc.
20115 1635 1565 623 Charter Communications
4323 1602 1060 382 tw telecom holdings, inc.
22773 1591 2911 115 Cox Communications Inc.
30036 1427 261 757 Mediacom Communications Corp
7018 1258 14166 826 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 1564 544 16 Corbina telecom
34984 689 188 172 BILISIM TELEKOM
31148 682 37 9 FreeNet ISP
12479 670 670 68 France Telecom Espana SA
6830 656 2215 427 UPC Broadband
20940 643 215 509 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 502 360 80 Bezeq International
3320 483 8442 399 Deutsche Telekom AG
3292 472 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 1864 334 174 Types of queries are: POCs, o
28573 1842 1136 57 Types of queries are: POCs, o
6503 1517 418 68 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1332 2983 332 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 664 74 98 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 578 243 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 1306 958 13 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 493 649 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
16637 160 666 86 MTN Network Solutions
29571 158 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 3421 3807 195 BellSouth.net Inc.
7029 3410 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1941 11105 695 Korea Telecom (KIX)
1785 1899 680 129 PaeTec Communications, Inc.
10620 1864 334 174 Types of queries are: POCs, o
28573 1842 1136 57 Types of queries are: POCs, o
17974 1780 510 73 PT Telekomunikasi Indonesia
7545 1660 301 87 TPG Internet Pty Ltd
20115 1635 1565 623 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 3410 3239 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
28573 1842 1785 Types of queries are: POCs, o
1785 1899 1770 PaeTec Communications, Inc.
17974 1780 1707 PT Telekomunikasi Indonesia
10620 1864 1690 Types of queries are: POCs, o
7545 1660 1573 TPG Internet Pty Ltd
8402 1564 1548 Corbina telecom
22773 1591 1476 Cox Communications Inc.
6503 1517 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
5.28.192.0/18 31400 Accelerated IT Services GmbH
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
27.112.114.0/24 23884 Proimage Engineering and Comm

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 /14:830 /15:1495 /16:12179 /17:6213 /18:10475
/19:20653 /20:29132 /21:30122 /22:39292 /23:37745 /24:210288
/25:11 /26:21 /27:20 /28:151 /29:147 /30:75
/31:0 /32:140

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

ASN No of nets Total ann. Description
7029 3049 3410 Windstream Communications Inc
6389 2138 3421 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1715 1864 Types of queries are: POCs, o
8402 1542 1564 Corbina telecom
30036 1371 1427 Mediacom Communications Corp
6503 1274 1517 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1107 1306 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)
----------------------------------------------

1:537 2:591 4:14 5:1 6:3 8:409
12:1965 13:1 14:605 15:12 16:3 17:5
20:23 23:164 24:1755 27:1293 31:967 32:52
33:2 34:2 36:8 37:438 38:801 40:118
41:3066 42:136 44:3 46:1424 47:3 49:412
50:543 52:13 54:10 55:9 56:3 57:27
58:913 59:504 60:249 61:1174 62:985 63:2050
64:4165 65:2240 66:4450 67:2016 68:1166 69:3175
70:904 71:484 72:1827 74:2588 75:491 76:319
77:943 78:973 79:487 80:1218 81:909 82:672
83:548 84:486 85:1213 86:443 87:921 88:333
89:1689 90:291 91:4795 92:541 93:1465 94:1514
95:888 96:364 97:316 98:873 99:35 100:7
101:183 103:1020 106:103 107:187 108:263 109:1327
110:755 111:912 112:395 113:594 114:625 115:881
116:904 117:693 118:904 119:1198 120:341 121:786
122:1629 123:1101 124:1316 125:1244 128:518 129:188
130:246 131:594 132:174 133:22 134:237 135:62
136:213 137:173 138:333 139:181 140:465 141:241
142:391 143:427 144:516 145:70 146:494 147:287
148:746 149:305 150:150 151:178 152:464 153:172
154:11 155:417 156:216 157:336 158:178 159:475
160:337 161:237 162:344 163:181 164:582 165:388
166:571 167:467 168:843 169:125 170:865 171:130
172:2 173:1754 174:583 175:407 176:618 177:726
178:1359 180:1200 181:82 182:938 183:294 184:485
185:1 186:2256 187:1072 188:1247 189:1788 190:5562
192:5955 193:5298 194:3798 195:3195 196:1251 197:131
198:3600 199:4561 200:5741 201:1922 202:8295 203:8515
204:4255 205:2495 206:2642 207:2727 208:4068 209:3599
210:2668 211:1456 212:2019 213:1935 214:847 215:99
216:5086 217:1548 218:528 219:338 220:1229 221:539
222:294 223:327

End of report
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