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 2, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Thu 03 May, 2012

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

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

BGP routing table entries examined: 400560
Prefixes after maximum aggregation: 171004
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198156
Total ASes present in the Internet Routing Table: 38418
Prefixes per ASN: 10.43
Origin-only ASes present in the Internet Routing Table: 33112
Origin ASes announcing only one prefix: 15638
Transit ASes present in the Internet Routing Table: 5306
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: 1208
Unregistered ASNs in the Routing Table: 221
Number of 32-bit ASNs allocated by the RIRs: 2656
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5654
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 120
Number of addresses announced to Internet: 2562271232
Equivalent to 152 /8s, 185 /16s and 40 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.2
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: 169369

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

Prefixes being announced by APNIC Region ASes: 93830
Total APNIC prefixes after maximum aggregation: 30845
APNIC Deaggregation factor: 3.04
Prefixes being announced from the APNIC address blocks: 91316
Unique aggregates announced from the APNIC address blocks: 39873
APNIC Region origin ASes present in the Internet Routing Table: 4643
APNIC Prefixes per ASN: 19.67
APNIC Region origin ASes announcing only one prefix: 1265
APNIC Region transit ASes present in the Internet Routing Table: 706
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: 644124416
Equivalent to 38 /8s, 100 /16s and 143 /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: 149091
Total ARIN prefixes after maximum aggregation: 75922
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120372
Unique aggregates announced from the ARIN address blocks: 50555
ARIN Region origin ASes present in the Internet Routing Table: 15000
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5728
ARIN Region transit ASes present in the Internet Routing Table: 1517
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: 807378432
Equivalent to 48 /8s, 31 /16s and 158 /24s
Percentage of available ARIN address space announced: 64.4

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: 102040
Total RIPE prefixes after maximum aggregation: 53883
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93986
Unique aggregates announced from the RIPE address blocks: 58351
RIPE Region origin ASes present in the Internet Routing Table: 16505
RIPE Prefixes per ASN: 5.69
RIPE Region origin ASes announcing only one prefix: 8037
RIPE Region transit ASes present in the Internet Routing Table: 2602
Average RIPE Region AS path length visible: 3.5
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: 511013376
Equivalent to 30 /8s, 117 /16s and 114 /24s
Percentage of available RIPE address space announced: 82.3

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: 40234
Total LACNIC prefixes after maximum aggregation: 8134
LACNIC Deaggregation factor: 4.95
Prefixes being announced from the LACNIC address blocks: 40317
Unique aggregates announced from the LACNIC address blocks: 20304
LACNIC Region origin ASes present in the Internet Routing Table: 1580
LACNIC Prefixes per ASN: 25.52
LACNIC Region origin ASes announcing only one prefix: 440
LACNIC Region transit ASes present in the Internet Routing Table: 290
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: 99708416
Equivalent to 5 /8s, 241 /16s and 110 /24s
Percentage of available LACNIC address space announced: 66.0

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: 8893
Total AfriNIC prefixes after maximum aggregation: 2152
AfriNIC Deaggregation factor: 4.13
Prefixes being announced from the AfriNIC address blocks: 6949
Unique aggregates announced from the AfriNIC address blocks: 2216
AfriNIC Region origin ASes present in the Internet Routing Table: 532
AfriNIC Prefixes per ASN: 13.06
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 119
Average AfriNIC Region AS path length visible: 3.5
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: 31796992
Equivalent to 1 /8s, 229 /16s and 47 /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 1909 11104 693 Korea Telecom (KIX)
17974 1778 510 73 PT Telekomunikasi Indonesia
7545 1660 301 88 TPG Internet Pty Ltd
4755 1553 384 153 TATA Communications formerly
9829 1262 1069 30 National Internet Backbone
9583 1150 85 495 Sify Limited
7552 1131 1062 11 Vietel Corporation
24560 1024 385 167 Bharti Airtel Ltd., Telemedia
9498 960 291 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 3422 3806 198 BellSouth.net Inc.
7029 3403 1016 171 Windstream Communications Inc
18566 2093 382 179 Covad Communications Co.
1785 1908 680 129 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1603 1060 384 tw telecom holdings, inc.
22773 1589 2911 115 Cox Communications Inc.
30036 1421 260 765 Mediacom Communications Corp
7018 1252 9815 822 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 1580 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
34984 687 188 172 BILISIM TELEKOM
31148 682 37 9 FreeNet ISP
6830 655 2215 426 UPC Broadband
12479 646 668 66 France Telecom Espana SA
20940 629 207 501 Akamai Technologies European
9116 541 326 32 Goldenlines main autonomous s
3320 531 8441 397 Deutsche Telekom AG
8551 503 360 80 Bezeq International

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 332 179 Types of queries are: POCs, o
28573 1773 1114 58 Types of queries are: POCs, o
6503 1522 418 66 Axtel, S.A.B. de C.V.
7303 1363 830 188 Telecom Argentina S.A.
8151 1339 2981 337 Uninet S.A. de C.V.
26615 904 761 33 Tim Celular S.A.
27947 663 74 98 Telconet S.A
11172 645 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 575 242 100 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 1307 958 13 TEDATA
24863 838 274 32 LINKdotNET AS number
6713 492 649 18 Itissalat Al-MAGHRIB
3741 264 921 222 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 3422 3806 198 BellSouth.net Inc.
7029 3403 1016 171 Windstream Communications Inc
18566 2093 382 179 Covad Communications Co.
4766 1909 11104 693 Korea Telecom (KIX)
1785 1908 680 129 PaeTec Communications, Inc.
10620 1854 332 179 Types of queries are: POCs, o
17974 1778 510 73 PT Telekomunikasi Indonesia
28573 1773 1114 58 Types of queries are: POCs, o
7545 1660 301 88 TPG Internet Pty Ltd
20115 1639 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 3403 3232 Windstream Communications Inc
18566 2093 1914 Covad Communications Co.
1785 1908 1779 PaeTec Communications, Inc.
28573 1773 1715 Types of queries are: POCs, o
17974 1778 1705 PT Telekomunikasi Indonesia
10620 1854 1675 Types of queries are: POCs, o
7545 1660 1572 TPG Internet Pty Ltd
8402 1580 1564 Corbina telecom
22773 1589 1474 Cox Communications Inc.
6503 1522 1456 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
5.10.144.0/20 25160 Vorboss LTD AS Number
5.11.64.0/20 31214 TIS-DIALOG Autonomous system
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 /10:29 /11:81 /12:235
/13:461 /14:827 /15:1490 /16:12189 /17:6212 /18:10461
/19:20620 /20:28923 /21:29756 /22:40057 /23:37705 /24:210924
/25:11 /26:21 /27:19 /28:152 /29:149 /30:73
/31:0 /32:133

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

ASN No of nets Total ann. Description
7029 3043 3403 Windstream Communications Inc
6389 2139 3422 BellSouth.net Inc.
18566 2042 2093 Covad Communications Co.
10620 1712 1854 Types of queries are: POCs, o
8402 1558 1580 Corbina telecom
30036 1365 1421 Mediacom Communications Corp
6503 1281 1522 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1108 1307 TEDATA
1785 1072 1908 PaeTec Communications, Inc.

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

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

1:530 2:559 4:14 6:3 8:405 12:1960
13:1 14:607 15:12 16:3 17:5 20:23
23:163 24:1758 27:1285 31:974 32:52 33:2
34:2 36:8 37:425 38:791 40:120 41:3075
42:134 44:3 46:1420 47:3 49:410 50:540
52:13 54:10 55:8 56:3 57:26 58:910
59:481 60:248 61:1100 62:980 63:2005 64:4162
65:2252 66:4460 67:2034 68:1162 69:3172 70:902
71:484 72:1827 74:2612 75:494 76:317 77:942
78:949 79:485 80:1210 81:904 82:669 83:545
84:482 85:1198 86:422 87:929 88:339 89:1620
90:291 91:4763 92:523 93:1497 94:1507 95:892
96:354 97:315 98:882 99:34 100:7 101:181
103:1015 106:101 107:190 108:253 109:1313 110:740
111:915 112:442 113:583 114:637 115:798 116:906
117:701 118:907 119:1190 120:347 121:670 122:1630
123:1101 124:1317 125:1243 128:524 129:188 130:248
131:617 132:169 133:22 134:234 135:62 136:212
137:174 138:356 139:164 140:466 141:244 142:391
143:424 144:518 145:69 146:493 147:280 148:750
149:305 150:150 151:179 152:462 153:172 154:11
155:416 156:214 157:331 158:175 159:468 160:337
161:236 162:345 163:181 164:580 165:401 166:572
167:467 168:815 169:127 170:860 171:127 172:2
173:1761 174:561 175:424 176:661 177:699 178:1361
180:1197 181:81 182:803 183:292 184:481 185:1
186:2244 187:1060 188:1226 189:1783 190:5483 192:5973
193:5550 194:4658 195:3591 196:1249 197:132 198:3605
199:4520 200:5727 201:1934 202:8273 203:8519 204:4260
205:2479 206:2662 207:2722 208:4048 209:3610 210:2662
211:1452 212:2000 213:1935 214:846 215:102 216:5106
217:1538 218:528 219:315 220:1226 221:540 222:296
223:322

End of report
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