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, May 1, 2012

[bgp-stats] Routing Table Report - RouteViews-3 view

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Wed 02 May, 2012

NB: RouteViews data includes iBGP information from some ASNs.
Treat the information provided below appropriately.

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

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

BGP routing table entries examined: 412603
Prefixes after maximum aggregation: 174496
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 198331
Total ASes present in the Internet Routing Table: 40887
Prefixes per ASN: 10.09
Origin-only ASes present in the Internet Routing Table: 33204
Origin ASes announcing only one prefix: 15645
Transit ASes present in the Internet Routing Table: 5390
Transit-only ASes present in the Internet Routing Table: 126
Average AS path length visible in the Internet Routing Table: 4.2
Max AS path length visible: 27
Max AS path prepend of ASN (51742) 24
Prefixes from unregistered ASNs in the Routing Table: 6151
Unregistered ASNs in the Routing Table: 142
Number of 32-bit ASNs allocated by the RIRs: 2656
Number of 32-bit ASNs visible in the Routing Table: 2293
Prefixes from 32-bit ASNs in the Routing Table: 5738
Special use prefixes present in the Routing Table: 86
Prefixes being announced from unallocated address space: 110
Number of addresses announced to Internet: 2541453396
Equivalent to 151 /8s, 123 /16s and 128 /24s
Percentage of available address space announced: 68.6
Percentage of allocated address space announced: 68.6
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: 175269

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

Prefixes being announced by APNIC Region ASes: 97548
Total APNIC prefixes after maximum aggregation: 31184
APNIC Deaggregation factor: 3.13
Prefixes being announced from the APNIC address blocks: 94102
Unique aggregates announced from the APNIC address blocks: 39844
APNIC Region origin ASes present in the Internet Routing Table: 4671
APNIC Prefixes per ASN: 20.15
APNIC Region origin ASes announcing only one prefix: 1255
APNIC Region transit ASes present in the Internet Routing Table: 732
Average APNIC Region AS path length visible: 4.3
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 192
Number of APNIC addresses announced to Internet: 644358912
Equivalent to 38 /8s, 104 /16s and 35 /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: 153353
Total ARIN prefixes after maximum aggregation: 78671
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 124137
Unique aggregates announced from the ARIN address blocks: 50463
ARIN Region origin ASes present in the Internet Routing Table: 15082
ARIN Prefixes per ASN: 8.23
ARIN Region origin ASes announcing only one prefix: 5726
ARIN Region transit ASes present in the Internet Routing Table: 1549
Average ARIN Region AS path length visible: 3.9
Max ARIN Region AS path length visible: 19
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 807364096
Equivalent to 48 /8s, 31 /16s and 102 /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: 105121
Total RIPE prefixes after maximum aggregation: 54134
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 96205
Unique aggregates announced from the RIPE address blocks: 58521
RIPE Region origin ASes present in the Internet Routing Table: 16545
RIPE Prefixes per ASN: 5.81
RIPE Region origin ASes announcing only one prefix: 8052
RIPE Region transit ASes present in the Internet Routing Table: 2609
Average RIPE Region AS path length visible: 4.3
Max RIPE Region AS path length visible: 27
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1543
Number of RIPE addresses announced to Internet: 511637644
Equivalent to 30 /8s, 126 /16s and 248 /24s
Percentage of available RIPE address space announced: 82.4

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: 41638
Total LACNIC prefixes after maximum aggregation: 8273
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 41510
Unique aggregates announced from the LACNIC address blocks: 20258
LACNIC Region origin ASes present in the Internet Routing Table: 1591
LACNIC Prefixes per ASN: 26.09
LACNIC Region origin ASes announcing only one prefix: 440
LACNIC Region transit ASes present in the Internet Routing Table: 297
Average LACNIC Region AS path length visible: 4.3
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 536
Number of LACNIC addresses announced to Internet: 99760136
Equivalent to 5 /8s, 242 /16s and 56 /24s
Percentage of available LACNIC address space announced: 66.1

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: 9019
Total AfriNIC prefixes after maximum aggregation: 2166
AfriNIC Deaggregation factor: 4.16
Prefixes being announced from the AfriNIC address blocks: 7034
Unique aggregates announced from the AfriNIC address blocks: 2225
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.03
AfriNIC Region origin ASes announcing only one prefix: 172
AfriNIC Region transit ASes present in the Internet Routing Table: 124
Average AfriNIC Region AS path length visible: 4.5
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 31797248
Equivalent to 1 /8s, 229 /16s and 48 /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 1915 11105 694 Korea Telecom (KIX)
17974 1869 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1659 301 87 TPG Internet Pty Ltd
4755 1577 385 156 Videsh Sanchar Nigam Ltd. Aut
9829 1262 1069 30 BSNL National Internet Backbo
7552 1169 1062 11 Vietel Corporation
9583 1149 85 494 Sify Limited
4808 1043 2021 307 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd.
9498 958 291 65 BHARTI Airtel Ltd.

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

ARIN Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 3425 3807 195 bellsouth.net, inc.
7029 3411 1016 171 Windstream Communications Inc
18566 2091 382 179 Covad Communications
1785 1909 681 130 AppliedTheory Corporation
20115 1640 1566 620 Charter Communications
4323 1595 1060 383 Time Warner Telecom
22773 1590 2911 115 Cox Communications, Inc.
30036 1423 261 769 Mediacom Communications Corp
7018 1255 13887 823 AT&T WorldNet Services
11492 1186 216 364 Cable One

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

RIPE Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8402 1651 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
15557 1160 2247 53 LDCOM NETWORKS
286 1054 853 197 KPNQwest Backbone AS
34984 684 188 172 Tellcom Iletisim Hizmetleri
31148 682 37 9 FreeNet ISP
6830 657 2216 428 UPC Distribution Services
12479 650 668 66 Uni2 Autonomous System
20940 631 207 501 Akamai Technologies European
8551 573 360 80 Bezeq International

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

LACNIC Region per AS prefix count summary
-----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
10620 1854 332 179 TVCABLE BOGOTA
28573 1820 1114 62 Types of queries are: POCs, o
6503 1541 418 67 AVANTEL, S.A.
8151 1530 2982 327 Uninet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 904 761 33 Types of queries are: POCs, o
27947 686 74 98 Telconet S.A
11172 643 107 74 Alestra
22047 582 326 15 Types of queries are: POCs, o
3816 577 242 100 COLOMBIA TELECOMUNICACIONES S

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

AfriNIC Region per AS prefix count summary
------------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8452 1309 958 13 TEDATA
24863 845 274 33 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 YEBO-AS
33776 195 12 24 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 162 666 84 Johnnic e-Ventures
29571 157 15 16 Ci Telecom Autonomous system

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

Global Per AS prefix count summary
----------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 3425 3807 195 bellsouth.net, inc.
7029 3411 1016 171 Windstream Communications Inc
18566 2091 382 179 Covad Communications
4766 1915 11105 694 Korea Telecom (KIX)
1785 1909 681 130 AppliedTheory Corporation
17974 1869 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1854 332 179 TVCABLE BOGOTA
28573 1820 1114 62 Types of queries are: POCs, o
7545 1659 301 87 TPG Internet Pty Ltd
8402 1651 544 16 Corbina telecom

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

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

ASN No of nets Net Savings Description
7029 3411 3240 Windstream Communications Inc
18566 2091 1912 Covad Communications
17974 1869 1796 PT TELEKOMUNIKASI INDONESIA
1785 1909 1779 AppliedTheory Corporation
28573 1820 1758 Types of queries are: POCs, o
10620 1854 1675 TVCABLE BOGOTA
8402 1651 1635 Corbina telecom
7545 1659 1572 TPG Internet Pty Ltd
22773 1590 1475 Cox Communications, Inc.
6503 1541 1474 AVANTEL, S.A.

Complete listing at http://thyme.rand.apnic.net/rviews/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
65220 PRIVATE 5.1.32.0/21 23456 >>UNKNOWN<<
23456 UNALLOCATED 5.1.56.0/21 2819 KPNQwest Czechia AS
23456 UNALLOCATED 5.2.0.0/21 8928 Interoute Telecommun
23456 UNALLOCATED 8.10.2.0/24 3257 Tiscali Intl Network
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
32567 UNALLOCATED 12.14.170.0/24 7018 AT&T WorldNet Servic
32567 UNALLOCATED 12.25.107.0/24 4323 Time Warner Telecom
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic

Complete listing at http://thyme.rand.apnic.net/rviews/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
10.29.245.1/32 286 KPNQwest Backbone AS
10.29.245.2/32 286 KPNQwest Backbone AS
10.29.245.19/32 286 KPNQwest Backbone AS
10.29.245.20/32 286 KPNQwest Backbone AS
10.29.245.21/32 286 KPNQwest Backbone AS
10.29.245.22/32 286 KPNQwest Backbone AS
10.29.245.25/32 286 KPNQwest Backbone AS
10.29.245.26/32 286 KPNQwest Backbone AS
10.29.245.27/32 286 KPNQwest Backbone AS
10.29.245.28/32 286 KPNQwest Backbone AS

Complete listing at http://thyme.rand.apnic.net/rviews/data-dsua

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
5.10.144.0/20 25160 Vorboss LTD AS Number
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
27.54.144.0/24 45774 Chandra Net Pvt. Limited, Ind

Complete listing at http://thyme.rand.apnic.net/rviews/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 /8:19 /9:12 /10:28 /11:81 /12:234
/13:461 /14:839 /15:1529 /16:12400 /17:6524 /18:10952
/19:21201 /20:30236 /21:30566 /22:41069 /23:38630 /24:216210
/25:71 /26:76 /27:105 /28:271 /29:112 /30:497
/31:21 /32:459

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

ASN No of nets Total ann. Description
7029 3049 3411 Windstream Communications Inc
6389 2142 3425 bellsouth.net, inc.
18566 2040 2091 Covad Communications
10620 1712 1854 TVCABLE BOGOTA
8402 1629 1651 Corbina telecom
30036 1367 1423 Mediacom Communications Corp
6503 1298 1541 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1110 1309 TEDATA
15557 1107 1160 LDCOM NETWORKS

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

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

1:543 2:530 4:18 5:1 6:3 8:406
12:2005 13:1 14:615 15:12 16:3 17:5
20:23 23:168 24:1772 27:1279 31:978 32:119
33:2 34:2 36:8 37:429 38:800 39:4
40:120 41:3136 42:136 44:3 46:1499 47:3
49:419 50:545 52:13 54:10 55:10 56:3
57:38 58:972 59:491 60:253 61:1218 62:1033
63:2022 64:4213 65:2256 66:4506 67:2057 68:1348
69:3295 70:950 71:484 72:1858 73:1 74:2666
75:507 76:330 77:949 78:1012 79:504 80:1253
81:916 82:685 83:551 84:605 85:1214 86:769
87:941 88:354 89:1654 90:291 91:4792 92:525
93:1646 94:1515 95:903 96:361 97:315 98:923
99:37 100:7 101:189 103:1039 106:102 107:191
108:273 109:1674 110:767 111:924 112:456 113:604
114:648 115:816 116:936 117:720 118:922 119:1233
120:356 121:716 122:1677 123:1110 124:1391 125:1245
128:564 129:197 130:259 131:621 132:180 133:22
134:248 135:62 136:214 137:177 138:356 139:175
140:486 141:245 142:408 143:396 144:520 145:74
146:500 147:291 148:806 149:306 150:159 151:180
152:464 153:172 154:13 155:416 156:214 157:377
158:177 159:542 160:338 161:260 162:348 163:191
164:582 165:421 166:573 167:468 168:821 169:129
170:861 171:127 172:2 173:1783 174:593 175:450
176:687 177:692 178:1363 180:1234 181:82 182:836
183:290 184:465 185:1 186:2257 187:1067 188:1228
189:1802 190:5568 192:6049 193:5577 194:4687 195:3685
196:1287 197:135 198:3670 199:4570 200:5837 201:1941
202:8535 203:8662 204:4332 205:2508 206:2770 207:2815
208:4081 209:3657 210:2759 211:1492 212:2058 213:1941
214:848 215:104 216:5156 217:1541 218:547 219:332
220:1238 221:559 222:329 223:336

End of report
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