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.

Monday, May 7, 2012

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 399912
Prefixes after maximum aggregation: 171283
Deaggregation factor: 2.33
Unique aggregates announced to Internet: 198529
Total ASes present in the Internet Routing Table: 38457
Prefixes per ASN: 10.40
Origin-only ASes present in the Internet Routing Table: 33145
Origin ASes announcing only one prefix: 15660
Transit ASes present in the Internet Routing Table: 5312
Transit-only ASes present in the Internet Routing Table: 119
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: 1211
Unregistered ASNs in the Routing Table: 222
Number of 32-bit ASNs allocated by the RIRs: 2669
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5721
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 109
Number of addresses announced to Internet: 2566374400
Equivalent to 152 /8s, 247 /16s and 196 /24s
Percentage of available address space announced: 69.2
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: 169364

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

Prefixes being announced by APNIC Region ASes: 94010
Total APNIC prefixes after maximum aggregation: 30862
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91479
Unique aggregates announced from the APNIC address blocks: 39863
APNIC Region origin ASes present in the Internet Routing Table: 4641
APNIC Prefixes per ASN: 19.71
APNIC Region origin ASes announcing only one prefix: 1264
APNIC Region transit ASes present in the Internet Routing Table: 709
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: 644151552
Equivalent to 38 /8s, 100 /16s and 249 /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: 149165
Total ARIN prefixes after maximum aggregation: 76044
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120433
Unique aggregates announced from the ARIN address blocks: 50638
ARIN Region origin ASes present in the Internet Routing Table: 15014
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5729
ARIN Region transit ASes present in the Internet Routing Table: 1512
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: 810060032
Equivalent to 48 /8s, 72 /16s and 137 /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: 100688
Total RIPE prefixes after maximum aggregation: 53965
RIPE Deaggregation factor: 1.87
Prefixes being announced from the RIPE address blocks: 92781
Unique aggregates announced from the RIPE address blocks: 58515
RIPE Region origin ASes present in the Internet Routing Table: 16527
RIPE Prefixes per ASN: 5.61
RIPE Region origin ASes announcing only one prefix: 8055
RIPE Region transit ASes present in the Internet Routing Table: 2612
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: 511841536
Equivalent to 30 /8s, 130 /16s and 21 /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: 40534
Total LACNIC prefixes after maximum aggregation: 8158
LACNIC Deaggregation factor: 4.97
Prefixes being announced from the LACNIC address blocks: 40635
Unique aggregates announced from the LACNIC address blocks: 20390
LACNIC Region origin ASes present in the Internet Routing Table: 1584
LACNIC Prefixes per ASN: 25.65
LACNIC Region origin ASes announcing only one prefix: 444
LACNIC Region transit ASes present in the Internet Routing Table: 292
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: 100092672
Equivalent to 5 /8s, 247 /16s and 75 /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: 8931
Total AfriNIC prefixes after maximum aggregation: 2142
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6967
Unique aggregates announced from the AfriNIC address blocks: 2227
AfriNIC Region origin ASes present in the Internet Routing Table: 534
AfriNIC Prefixes per ASN: 13.05
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 121
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: 31802368
Equivalent to 1 /8s, 229 /16s and 68 /24s
Percentage of available AfriNIC address space announced: 47.4

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 1777 510 73 PT Telekomunikasi Indonesia
7545 1662 301 89 TPG Internet Pty Ltd
4755 1552 384 149 TATA Communications formerly
9829 1281 1069 30 National Internet Backbone
9583 1150 85 495 Sify Limited
7552 1131 1062 11 Vietel Corporation
24560 1025 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 65 BHARTI Airtel Ltd.
4808 955 1938 286 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 3425 3807 197 BellSouth.net Inc.
7029 3408 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1899 680 130 PaeTec Communications, Inc.
20115 1640 1566 619 Charter Communications
4323 1602 1060 383 tw telecom holdings, inc.
22773 1591 2911 115 Cox Communications Inc.
30036 1423 261 761 Mediacom Communications Corp
7018 1256 14166 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 1543 544 16 Corbina telecom
34984 688 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
12479 669 670 68 France Telecom Espana SA
6830 655 2215 426 UPC Broadband
20940 630 209 498 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
3320 533 8441 398 Deutsche Telekom AG
8551 504 360 80 Bezeq International
2578 500 33 7 Demos, Moscow, Russia

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 1854 332 184 Types of queries are: POCs, o
28573 1828 1131 56 Types of queries are: POCs, o
6503 1518 418 69 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1334 2983 334 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 663 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 841 274 32 LINKdotNET AS number
6713 497 649 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
29571 157 15 16 Ci Telecom Autonomous system
36923 157 20 4 Swift Networks Limited

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 3425 3807 197 BellSouth.net Inc.
7029 3408 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1941 11105 695 Korea Telecom (KIX)
1785 1899 680 130 PaeTec Communications, Inc.
10620 1854 332 184 Types of queries are: POCs, o
28573 1828 1131 56 Types of queries are: POCs, o
17974 1777 510 73 PT Telekomunikasi Indonesia
7545 1662 301 89 TPG Internet Pty Ltd
20115 1640 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 3408 3237 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
28573 1828 1772 Types of queries are: POCs, o
1785 1899 1769 PaeTec Communications, Inc.
17974 1777 1704 PT Telekomunikasi Indonesia
10620 1854 1670 Types of queries are: POCs, o
7545 1662 1573 TPG Internet Pty Ltd
8402 1543 1527 Corbina telecom
22773 1591 1476 Cox Communications Inc.
6503 1518 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
5.23.40.0/21 13193 Nerim -- xDSL Internet Provid
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 /14:829 /15:1491 /16:12175 /17:6202 /18:10473
/19:20651 /20:29103 /21:29843 /22:39847 /23:37744 /24:210154
/25:11 /26:21 /27:20 /28:151 /29:146 /30:72
/31:0 /32:140

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

ASN No of nets Total ann. Description
7029 3047 3408 Windstream Communications Inc
6389 2142 3425 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1707 1854 Types of queries are: POCs, o
8402 1521 1543 Corbina telecom
30036 1367 1423 Mediacom Communications Corp
6503 1274 1518 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1107 1306 TEDATA
7011 1068 1183 Frontier Communications of Am

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

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

1:535 2:538 4:14 6:3 8:407 12:1958
13:1 14:604 15:12 16:3 17:5 20:23
23:162 24:1757 27:1286 31:970 32:52 33:2
34:2 36:8 37:433 38:798 40:118 41:3091
42:136 44:3 46:1420 47:3 49:412 50:543
52:13 54:10 55:11 56:3 57:28 58:908
59:480 60:248 61:1096 62:984 63:2045 64:4153
65:2251 66:4465 67:2030 68:1162 69:3169 70:903
71:485 72:1825 74:2586 75:492 76:317 77:942
78:973 79:490 80:1216 81:908 82:672 83:545
84:484 85:1203 86:437 87:918 88:330 89:1672
90:291 91:4773 92:523 93:1493 94:1506 95:893
96:364 97:316 98:865 99:34 100:7 101:182
103:1023 106:103 107:191 108:262 109:1319 110:751
111:913 112:397 113:592 114:622 115:805 116:902
117:696 118:906 119:1197 120:346 121:669 122:1631
123:1102 124:1311 125:1244 128:525 129:188 130:246
131:619 132:171 133:22 134:236 135:62 136:213
137:172 138:356 139:181 140:466 141:244 142:391
143:422 144:514 145:70 146:496 147:287 148:747
149:305 150:148 151:180 152:463 153:172 154:11
155:417 156:214 157:336 158:178 159:474 160:337
161:236 162:344 163:181 164:581 165:388 166:572
167:467 168:817 169:127 170:863 171:128 172:2
173:1755 174:587 175:424 176:632 177:720 178:1358
180:1198 181:82 182:938 183:292 184:480 185:1
186:2254 187:1064 188:1248 189:1762 190:5521 192:5974
193:5294 194:3966 195:3404 196:1255 197:131 198:3611
199:4537 200:5753 201:1924 202:8282 203:8506 204:4258
205:2489 206:2655 207:2723 208:4039 209:3598 210:2656
211:1457 212:2009 213:1943 214:856 215:99 216:5097
217:1543 218:527 219:315 220:1228 221:539 222:294
223:325

End of report
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