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, June 3, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 04 Jun, 2012

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

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

BGP routing table entries examined: 405154
Prefixes after maximum aggregation: 172469
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 200654
Total ASes present in the Internet Routing Table: 38594
Prefixes per ASN: 10.50
Origin-only ASes present in the Internet Routing Table: 33284
Origin ASes announcing only one prefix: 15698
Transit ASes present in the Internet Routing Table: 5310
Transit-only ASes present in the Internet Routing Table: 114
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: 1177
Unregistered ASNs in the Routing Table: 231
Number of 32-bit ASNs allocated by the RIRs: 2794
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6161
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 113
Number of addresses announced to Internet: 2580477184
Equivalent to 153 /8s, 206 /16s and 245 /24s
Percentage of available address space announced: 69.6
Percentage of allocated address space announced: 69.7
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 166546

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

Prefixes being announced by APNIC Region ASes: 94694
Total APNIC prefixes after maximum aggregation: 30983
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 92166
Unique aggregates announced from the APNIC address blocks: 40086
APNIC Region origin ASes present in the Internet Routing Table: 4651
APNIC Prefixes per ASN: 19.82
APNIC Region origin ASes announcing only one prefix: 1271
APNIC Region transit ASes present in the Internet Routing Table: 713
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: 645972992
Equivalent to 38 /8s, 128 /16s and 196 /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, 131072-133119
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: 150222
Total ARIN prefixes after maximum aggregation: 76514
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120967
Unique aggregates announced from the ARIN address blocks: 51195
ARIN Region origin ASes present in the Internet Routing Table: 15077
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5744
ARIN Region transit ASes present in the Internet Routing Table: 1524
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 19
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 816858368
Equivalent to 48 /8s, 176 /16s and 69 /24s
Percentage of available ARIN address space announced: 65.1

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: 102944
Total RIPE prefixes after maximum aggregation: 54587
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 95042
Unique aggregates announced from the RIPE address blocks: 59424
RIPE Region origin ASes present in the Internet Routing Table: 16593
RIPE Prefixes per ASN: 5.73
RIPE Region origin ASes announcing only one prefix: 8072
RIPE Region transit ASes present in the Internet Routing Table: 2591
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 22
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 515157504
Equivalent to 30 /8s, 180 /16s and 174 /24s
Percentage of available RIPE address space announced: 83.0

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
59392-61439, 196608-199679
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: 41166
Total LACNIC prefixes after maximum aggregation: 8155
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 41522
Unique aggregates announced from the LACNIC address blocks: 20612
LACNIC Region origin ASes present in the Internet Routing Table: 1584
LACNIC Prefixes per ASN: 26.21
LACNIC Region origin ASes announcing only one prefix: 445
LACNIC Region transit ASes present in the Internet Routing Table: 298
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 101740544
Equivalent to 6 /8s, 16 /16s and 112 /24s
Percentage of available LACNIC address space announced: 67.4

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: 9144
Total AfriNIC prefixes after maximum aggregation: 2166
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 7206
Unique aggregates announced from the AfriNIC address blocks: 2182
AfriNIC Region origin ASes present in the Internet Routing Table: 539
AfriNIC Prefixes per ASN: 13.37
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 117
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: 31886848
Equivalent to 1 /8s, 230 /16s and 142 /24s
Percentage of available AfriNIC address space announced: 47.5

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 1982 11104 732 Korea Telecom (KIX)
17974 1840 530 81 PT Telekomunikasi Indonesia
7545 1667 301 87 TPG Internet Pty Ltd
4755 1527 384 153 TATA Communications formerly
9829 1298 1085 28 National Internet Backbone
9583 1173 87 501 Sify Limited
7552 1120 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 63 BHARTI Airtel Ltd.
4808 949 1938 283 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 3412 3807 194 BellSouth.net Inc.
7029 3353 1016 171 Windstream Communications Inc
18566 2093 382 181 Covad Communications Co.
1785 1912 680 130 PaeTec Communications, Inc.
20115 1646 1570 616 Charter Communications
22773 1637 2911 121 Cox Communications Inc.
4323 1570 1059 384 tw telecom holdings, inc.
30036 1422 265 752 Mediacom Communications Corp
7018 1233 10064 832 AT&T Services, Inc.
7011 1188 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 1675 544 16 Corbina telecom
2118 1301 97 14 EUnet/RELCOM Autonomous Syste
34984 704 188 170 BILISIM TELEKOM
12479 693 679 71 France Telecom Espana SA
31148 684 37 9 FreeNet ISP
6830 652 2215 423 UPC Broadband
20940 642 213 509 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 505 364 61 Bezeq International
3320 489 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 1926 341 204 Types of queries are: POCs, o
28573 1902 1184 48 Types of queries are: POCs, o
6503 1524 418 67 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1338 3047 329 Uninet S.A. de C.V.
26615 902 760 32 Tim Celular S.A.
27947 669 73 94 Telconet S.A
11172 646 107 74 Alestra, S. de R.L. de C.V.
3816 588 247 89 Types of queries are: POCs, o
22047 583 326 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 1158 958 13 TEDATA
24863 848 274 32 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 210 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
15706 165 32 6 Sudatel Internet Exchange Aut
16637 161 666 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 3412 3807 194 BellSouth.net Inc.
7029 3353 1016 171 Windstream Communications Inc
18566 2093 382 181 Covad Communications Co.
4766 1982 11104 732 Korea Telecom (KIX)
10620 1926 341 204 Types of queries are: POCs, o
1785 1912 680 130 PaeTec Communications, Inc.
28573 1902 1184 48 Types of queries are: POCs, o
17974 1840 530 81 PT Telekomunikasi Indonesia
8402 1675 544 16 Corbina telecom
7545 1667 301 87 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 3353 3182 Windstream Communications Inc
18566 2093 1912 Covad Communications Co.
28573 1902 1854 Types of queries are: POCs, o
1785 1912 1782 PaeTec Communications, Inc.
17974 1840 1759 PT Telekomunikasi Indonesia
10620 1926 1722 Types of queries are: POCs, o
8402 1675 1659 Corbina telecom
7545 1667 1580 TPG Internet Pty Ltd
22773 1637 1516 Cox Communications Inc.
6503 1524 1457 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
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
41.222.79.0/24 36938 >>UNKNOWN<<

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 /9:13 /10:30 /11:82 /12:236
/13:459 /14:831 /15:1500 /16:12245 /17:6267 /18:10533
/19:20686 /20:29328 /21:30623 /22:40176 /23:38093 /24:213472
/25:11 /26:20 /27:19 /28:150 /29:146 /30:80
/31:0 /32:134

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

ASN No of nets Total ann. Description
7029 2995 3353 Windstream Communications Inc
6389 2130 3412 BellSouth.net Inc.
18566 2042 2093 Covad Communications Co.
8402 1653 1675 Corbina telecom
30036 1362 1422 Mediacom Communications Corp
6503 1213 1524 Axtel, S.A.B. de C.V.
11492 1151 1188 CABLE ONE, INC.
22773 1082 1637 Cox Communications Inc.
7011 1073 1188 Frontier Communications of Am
1785 1068 1912 PaeTec Communications, Inc.

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

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

1:550 2:718 3:1 4:13 5:39 6:3
8:422 12:1978 13:1 14:605 15:12 16:3
17:5 20:23 23:171 24:1772 27:1276 31:1008
32:51 33:2 34:2 36:8 37:645 38:807
40:123 41:3054 42:135 44:3 46:1435 47:3
49:432 50:550 52:13 54:12 55:11 56:3
57:27 58:910 59:486 60:252 61:1092 62:1013
63:2004 64:4239 65:2249 66:4457 67:2035 68:1157
69:3173 70:932 71:491 72:1820 74:2602 75:493
76:328 77:944 78:976 79:487 80:1217 81:939
82:667 83:544 84:493 85:1183 86:439 87:910
88:345 89:1722 90:292 91:4886 92:542 93:1356
94:1561 95:1162 96:358 97:314 98:883 99:35
100:7 101:255 103:1096 106:95 107:186 108:297
109:1340 110:755 111:925 112:406 113:598 114:622
115:828 116:917 117:703 118:910 119:1207 120:348
121:669 122:1627 123:1100 124:1326 125:1257 128:515
129:190 130:243 131:621 132:282 133:22 134:236
135:61 136:213 137:236 138:359 139:184 140:468
141:251 142:396 143:406 144:535 145:72 146:501
147:285 148:752 149:305 150:186 151:176 152:468
153:172 154:12 155:423 156:218 157:336 158:184
159:485 160:342 161:240 162:344 163:179 164:597
165:403 166:591 167:470 168:857 169:125 170:877
171:135 172:2 173:1763 174:599 175:424 176:546
177:824 178:1397 180:1217 181:88 182:1020 183:227
184:525 185:1 186:2307 187:1112 188:1303 189:1809
190:5591 192:5969 193:5569 194:4528 195:3403 196:1206
197:149 198:3611 199:4676 200:5786 201:1932 202:8313
203:8468 204:4254 205:2519 206:2685 207:2726 208:4031
209:3585 210:2689 211:1523 212:2045 213:1932 214:865
215:97 216:5062 217:1538 218:537 219:308 220:1233
221:554 222:286 223:307

End of report
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