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.

Tuesday, February 21, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 22 Feb, 2012

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

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

BGP routing table entries examined: 391807
Prefixes after maximum aggregation: 167834
Deaggregation factor: 2.33
Unique aggregates announced to Internet: 192518
Total ASes present in the Internet Routing Table: 38020
Prefixes per ASN: 10.31
Origin-only ASes present in the Internet Routing Table: 32739
Origin ASes announcing only one prefix: 15532
Transit ASes present in the Internet Routing Table: 5281
Transit-only ASes present in the Internet Routing Table: 129
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: 1128
Unregistered ASNs in the Routing Table: 192
Number of 32-bit ASNs allocated by the RIRs: 2286
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 4783
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 257
Number of addresses announced to Internet: 2534450176
Equivalent to 151 /8s, 16 /16s and 164 /24s
Percentage of available address space announced: 68.4
Percentage of allocated address space announced: 68.4
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 92.0
Total number of prefixes smaller than registry allocations: 165066

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

Prefixes being announced by APNIC Region ASes: 92641
Total APNIC prefixes after maximum aggregation: 30343
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 89949
Unique aggregates announced from the APNIC address blocks: 39192
APNIC Region origin ASes present in the Internet Routing Table: 4605
APNIC Prefixes per ASN: 19.53
APNIC Region origin ASes announcing only one prefix: 1251
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: 635913216
Equivalent to 37 /8s, 231 /16s and 68 /24s
Percentage of available APNIC address space announced: 80.6

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: 147220
Total ARIN prefixes after maximum aggregation: 74875
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 119357
Unique aggregates announced from the ARIN address blocks: 49506
ARIN Region origin ASes present in the Internet Routing Table: 14834
ARIN Prefixes per ASN: 8.05
ARIN Region origin ASes announcing only one prefix: 5655
ARIN Region transit ASes present in the Internet Routing Table: 1504
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 18
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 805312000
Equivalent to 48 /8s, 0 /16s and 22 /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: 99708
Total RIPE prefixes after maximum aggregation: 52470
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 91380
Unique aggregates announced from the RIPE address blocks: 56135
RIPE Region origin ASes present in the Internet Routing Table: 16319
RIPE Prefixes per ASN: 5.60
RIPE Region origin ASes announcing only one prefix: 8019
RIPE Region transit ASes present in the Internet Routing Table: 2598
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: 501091584
Equivalent to 29 /8s, 222 /16s and 13 /24s
Percentage of available RIPE address space announced: 80.7

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: 37836
Total LACNIC prefixes after maximum aggregation: 7981
LACNIC Deaggregation factor: 4.74
Prefixes being announced from the LACNIC address blocks: 37656
Unique aggregates announced from the LACNIC address blocks: 19460
LACNIC Region origin ASes present in the Internet Routing Table: 1563
LACNIC Prefixes per ASN: 24.09
LACNIC Region origin ASes announcing only one prefix: 445
LACNIC Region transit ASes present in the Internet Routing Table: 287
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 22
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 96628992
Equivalent to 5 /8s, 194 /16s and 113 /24s
Percentage of available LACNIC address space announced: 64.0

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: 8895
Total AfriNIC prefixes after maximum aggregation: 2074
AfriNIC Deaggregation factor: 4.29
Prefixes being announced from the AfriNIC address blocks: 6925
Unique aggregates announced from the AfriNIC address blocks: 2060
AfriNIC Region origin ASes present in the Internet Routing Table: 514
AfriNIC Prefixes per ASN: 13.47
AfriNIC Region origin ASes announcing only one prefix: 162
AfriNIC Region transit ASes present in the Internet Routing Table: 119
Average AfriNIC Region AS path length visible: 3.3
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: 31422208
Equivalent to 1 /8s, 223 /16s and 119 /24s
Percentage of available AfriNIC address space announced: 46.8

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 1923 11104 677 Korea Telecom (KIX)
17974 1655 503 36 PT Telekomunikasi Indonesia
7545 1638 303 84 TPG Internet Pty Ltd
4755 1540 386 158 TATA Communications formerly
9829 1179 997 29 National Internet Backbone
9583 1126 84 483 Sify Limited
7552 1103 1062 11 Vietel Corporation
24560 1018 385 167 Bharti Airtel Ltd., Telemedia
4808 977 1946 278 CNCGROUP IP network China169
18101 951 131 156 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
7029 3442 1040 172 Windstream Communications Inc
6389 3439 3807 202 BellSouth.net Inc.
18566 2092 382 177 Covad Communications Co.
1785 1874 680 125 PaeTec Communications, Inc.
20115 1627 1550 630 Charter Communications
4323 1605 1059 380 tw telecom holdings, inc.
22773 1528 2910 110 Cox Communications Inc.
30036 1406 251 746 Mediacom Communications Corp
19262 1387 4703 397 Verizon Online LLC
7018 1314 7012 854 AT&T Services, 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 1634 480 15 Corbina telecom
2118 1398 97 13 EUnet/RELCOM Autonomous Syste
15557 1099 2184 60 NEUF CEGETEL (formerly LDCOM
34984 656 188 171 BILISIM TELEKOM
6830 644 1927 413 UPC Broadband
20940 610 197 474 Akamai Technologies European
12479 604 644 55 France Telecom Espana SA
8551 566 360 81 Bezeq International
9116 541 326 32 Goldenlines main autonomous s
31148 538 37 9 FreeNet ISP

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 1746 323 171 Types of queries are: POCs, o
28573 1640 1085 65 Types of queries are: POCs, o
8151 1338 2990 344 Uninet S.A. de C.V.
7303 1264 758 183 Telecom Argentina S.A.
26615 817 660 33 Tim Celular S.A.
27947 638 67 108 Telconet S.A
11172 634 107 74 Alestra, S. de R.L. de C.V.
22047 581 322 17 Types of queries are: POCs, o
3816 555 238 91 Types of queries are: POCs, o
7738 550 1050 31 Telecomunicacoes da Bahia S.A

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 1229 958 13 TEDATA
24863 831 274 34 LINKdotNET AS number
6713 489 649 18 Itissalat Al-MAGHRIB
3741 277 923 228 The Internet Solution
33776 242 13 8 Starcomms Nigeria Limited
15706 226 32 6 Sudatel Internet Exchange Aut
29571 214 17 12 Ci Telecom Autonomous system
12258 197 28 62 Vodacom Internet Company
24835 194 80 8 RAYA Telecom - Egypt
16637 160 664 85 MTN Network Solutions

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
7029 3442 1040 172 Windstream Communications Inc
6389 3439 3807 202 BellSouth.net Inc.
18566 2092 382 177 Covad Communications Co.
4766 1923 11104 677 Korea Telecom (KIX)
1785 1874 680 125 PaeTec Communications, Inc.
10620 1746 323 171 Types of queries are: POCs, o
17974 1655 503 36 PT Telekomunikasi Indonesia
28573 1640 1085 65 Types of queries are: POCs, o
7545 1638 303 84 TPG Internet Pty Ltd
8402 1634 480 15 Corbina telecom

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
6389 3439 3237 BellSouth.net Inc.
18566 2092 1915 Covad Communications Co.
1785 1874 1749 PaeTec Communications, Inc.
17974 1655 1619 PT Telekomunikasi Indonesia
8402 1634 1619 Corbina telecom
10620 1746 1575 Types of queries are: POCs, o
28573 1640 1575 Types of queries are: POCs, o
7545 1638 1554 TPG Internet Pty Ltd
22773 1528 1418 Cox Communications Inc.
2118 1398 1385 EUnet/RELCOM Autonomous Syste

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
23.27.0.0/16 18779 Guru.com
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 /10:27 /11:80 /12:232
/13:459 /14:809 /15:1467 /16:12099 /17:6189 /18:10315
/19:20483 /20:28202 /21:28943 /22:39376 /23:36763 /24:205783
/25:11 /26:21 /27:20 /28:152 /29:138 /30:67
/31:0 /32:139

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

ASN No of nets Total ann. Description
7029 3081 3442 Windstream Communications Inc
6389 2108 3439 BellSouth.net Inc.
18566 2041 2092 Covad Communications Co.
10620 1643 1746 Types of queries are: POCs, o
8402 1613 1634 Corbina telecom
30036 1357 1406 Mediacom Communications Corp
11492 1119 1156 CABLE ONE, INC.
1785 1063 1874 PaeTec Communications, Inc.
15557 1046 1099 NEUF CEGETEL (formerly LDCOM
8452 1039 1229 TEDATA

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

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

1:465 2:623 4:14 6:3 8:385 12:1960
13:1 14:599 15:11 16:3 17:7 20:8
23:136 24:1728 27:1191 31:947 32:60 33:2
34:2 36:9 37:187 38:774 40:115 41:3085
42:96 44:3 46:1317 47:3 49:332 50:505
52:13 54:2 55:8 56:3 57:35 58:920
59:484 60:341 61:1088 62:967 63:2001 64:4097
65:2280 66:4445 67:2042 68:1173 69:3163 70:904
71:407 72:1790 74:2655 75:468 76:320 77:973
78:965 79:506 80:1220 81:876 82:628 83:526
84:583 85:1144 86:734 87:914 88:334 89:1562
90:282 91:4488 92:513 93:1354 94:1385 95:1098
96:414 97:313 98:819 99:38 100:4 101:141
103:805 106:64 107:159 108:169 109:1536 110:699
111:850 112:429 113:529 114:603 115:757 116:857
117:702 118:900 119:1244 120:362 121:655 122:1584
123:1076 124:1302 125:1319 128:504 129:182 130:211
131:577 132:155 133:21 134:224 135:62 136:213
137:179 138:287 139:143 140:457 141:262 142:376
143:395 144:512 145:69 146:479 147:237 148:712
149:300 150:156 151:198 152:445 153:171 154:6
155:415 156:210 157:337 158:161 159:439 160:321
161:228 162:340 163:177 164:527 165:392 166:558
167:457 168:758 169:146 170:838 171:114 172:4
173:1716 174:588 175:422 176:504 177:496 178:1279
180:1181 181:68 182:719 183:280 184:430 185:1
186:1959 187:853 188:1080 189:1179 190:5441 192:5941
193:5541 194:4343 195:3391 196:1265 197:167 198:3559
199:4363 200:5604 201:1731 202:8195 203:8546 204:4285
205:2420 206:2658 207:2723 208:4063 209:3530 210:2692
211:1447 212:2034 213:1843 214:852 215:91 216:5023
217:1503 218:535 219:335 220:1220 221:545 222:297
223:298

End of report
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