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.

Thursday, May 3, 2012

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Fri 04 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: 411931
Prefixes after maximum aggregation: 174185
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 198061
Total ASes present in the Internet Routing Table: 40900
Prefixes per ASN: 10.07
Origin-only ASes present in the Internet Routing Table: 33185
Origin ASes announcing only one prefix: 15637
Transit ASes present in the Internet Routing Table: 5409
Transit-only ASes present in the Internet Routing Table: 129
Average AS path length visible in the Internet Routing Table: 4.2
Max AS path length visible: 30
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 6212
Unregistered ASNs in the Routing Table: 146
Number of 32-bit ASNs allocated by the RIRs: 2658
Number of 32-bit ASNs visible in the Routing Table: 2306
Prefixes from 32-bit ASNs in the Routing Table: 5757
Special use prefixes present in the Routing Table: 87
Prefixes being announced from unallocated address space: 119
Number of addresses announced to Internet: 2521450325
Equivalent to 150 /8s, 74 /16s and 71 /24s
Percentage of available address space announced: 68.0
Percentage of allocated address space announced: 68.1
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: 175499

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

Prefixes being announced by APNIC Region ASes: 96504
Total APNIC prefixes after maximum aggregation: 30825
APNIC Deaggregation factor: 3.13
Prefixes being announced from the APNIC address blocks: 93033
Unique aggregates announced from the APNIC address blocks: 39286
APNIC Region origin ASes present in the Internet Routing Table: 4653
APNIC Prefixes per ASN: 19.99
APNIC Region origin ASes announcing only one prefix: 1250
APNIC Region transit ASes present in the Internet Routing Table: 727
Average APNIC Region AS path length visible: 4.3
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 193
Number of APNIC addresses announced to Internet: 622514176
Equivalent to 37 /8s, 26 /16s and 208 /24s
Percentage of available APNIC address space announced: 78.9

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 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: 153503
Total ARIN prefixes after maximum aggregation: 78674
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 124257
Unique aggregates announced from the ARIN address blocks: 50638
ARIN Region origin ASes present in the Internet Routing Table: 15087
ARIN Prefixes per ASN: 8.24
ARIN Region origin ASes announcing only one prefix: 5729
ARIN Region transit ASes present in the Internet Routing Table: 1556
Average ARIN Region AS path length visible: 3.9
Max ARIN Region AS path length visible: 23
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 809065472
Equivalent to 48 /8s, 57 /16s and 92 /24s
Percentage of available ARIN address space announced: 64.5

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: 105241
Total RIPE prefixes after maximum aggregation: 54194
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 96296
Unique aggregates announced from the RIPE address blocks: 58555
RIPE Region origin ASes present in the Internet Routing Table: 16557
RIPE Prefixes per ASN: 5.82
RIPE Region origin ASes announcing only one prefix: 8052
RIPE Region transit ASes present in the Internet Routing Table: 2622
Average RIPE Region AS path length visible: 4.3
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1552
Number of RIPE addresses announced to Internet: 511672460
Equivalent to 30 /8s, 127 /16s and 128 /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: 41695
Total LACNIC prefixes after maximum aggregation: 8262
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 41587
Unique aggregates announced from the LACNIC address blocks: 20296
LACNIC Region origin ASes present in the Internet Routing Table: 1591
LACNIC Prefixes per ASN: 26.14
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 301
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 22
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 539
Number of LACNIC addresses announced to Internet: 99915528
Equivalent to 5 /8s, 244 /16s and 151 /24s
Percentage of available LACNIC address space announced: 66.2

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: 9006
Total AfriNIC prefixes after maximum aggregation: 2162
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 7022
Unique aggregates announced from the AfriNIC address blocks: 2233
AfriNIC Region origin ASes present in the Internet Routing Table: 538
AfriNIC Prefixes per ASN: 13.05
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 122
Average AfriNIC Region AS path length visible: 4.4
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 31811840
Equivalent to 1 /8s, 229 /16s and 105 /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 1904 11102 685 Korea Telecom (KIX)
17974 1868 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1659 301 87 TPG Internet Pty Ltd
4755 1575 385 154 Videsh Sanchar Nigam Ltd. Aut
9829 1263 1069 30 BSNL National Internet Backbo
7552 1178 1062 11 Vietel Corporation
9583 1149 85 494 Sify Limited
24560 1026 385 167 Bharti Airtel Ltd.
4808 1007 1933 304 CNCGROUP IP network: China169
9498 959 291 63 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 3414 1016 171 Windstream Communications Inc
18566 2092 382 179 Covad Communications
1785 1908 680 130 AppliedTheory Corporation
20115 1639 1566 619 Charter Communications
4323 1602 1060 383 Time Warner Telecom
22773 1591 2911 115 Cox Communications, Inc.
30036 1422 261 766 Mediacom Communications Corp
7018 1253 13894 822 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 1658 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
15557 1160 2247 53 LDCOM NETWORKS
286 1058 853 197 KPNQwest Backbone AS
34984 688 188 172 Tellcom Iletisim Hizmetleri
31148 683 37 9 FreeNet ISP
6830 657 2216 428 UPC Distribution Services
12479 652 669 68 Uni2 Autonomous System
20940 632 208 501 Akamai Technologies European
8551 574 360 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 1830 1130 59 Types of queries are: POCs, o
6503 1541 418 67 AVANTEL, S.A.
8151 1522 2982 322 Uninet S.A. de C.V.
7303 1371 837 188 Telecom Argentina Stet-France
26615 904 761 33 Types of queries are: POCs, o
27947 686 74 98 Telconet S.A
11172 645 107 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 1313 958 13 TEDATA
24863 841 274 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 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/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 3414 1016 171 Windstream Communications Inc
18566 2092 382 179 Covad Communications
1785 1908 680 130 AppliedTheory Corporation
4766 1904 11102 685 Korea Telecom (KIX)
17974 1868 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1854 332 179 TVCABLE BOGOTA
28573 1830 1130 59 Types of queries are: POCs, o
7545 1659 301 87 TPG Internet Pty Ltd
8402 1658 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 3414 3243 Windstream Communications Inc
18566 2092 1913 Covad Communications
17974 1868 1795 PT TELEKOMUNIKASI INDONESIA
1785 1908 1778 AppliedTheory Corporation
28573 1830 1771 Types of queries are: POCs, o
10620 1854 1675 TVCABLE BOGOTA
8402 1658 1642 Corbina telecom
7545 1659 1572 TPG Internet Pty Ltd
22773 1591 1476 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 5.1.104.0/21 56484 FastIraq, LLC
23456 UNALLOCATED 5.1.112.0/21 8220 COLT Telecommunicati
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

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
5.11.0.0/21 3190 3-S-IT Dienstleistungen GmbH
5.11.48.0/21 47215 Filoo GmbH Autonomous System
5.11.64.0/20 31214 TIS-DIALOG Autonomous system
5.11.96.0/20 8220 COLT Telecommunications
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

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 /11:80 /12:231
/13:452 /14:832 /15:1513 /16:12315 /17:6461 /18:10866
/19:21074 /20:30198 /21:30484 /22:40990 /23:38643 /24:216116
/25:71 /26:77 /27:105 /28:272 /29:112 /30:498
/31:21 /32:461

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

ASN No of nets Total ann. Description
7029 3052 3414 Windstream Communications Inc
6389 2142 3425 bellsouth.net, inc.
18566 2041 2092 Covad Communications
10620 1712 1854 TVCABLE BOGOTA
8402 1636 1658 Corbina telecom
30036 1366 1422 Mediacom Communications Corp
6503 1297 1541 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1110 1313 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)
----------------------------------------------

1:542 2:548 4:18 6:3 8:407 12:1998
13:1 14:617 15:12 16:3 17:5 20:23
23:165 24:1772 27:1292 31:981 32:119 33:2
34:2 36:8 37:433 38:799 39:4 40:120
41:3109 42:136 44:3 46:1471 47:3 49:419
50:546 52:13 54:10 55:11 56:3 57:38
58:964 59:493 60:253 61:1219 62:1038 63:2052
64:4211 65:2256 66:4503 67:2062 68:1347 69:3296
70:951 71:485 72:1857 73:1 74:2669 75:507
76:329 77:947 78:986 79:504 80:1258 81:916
82:680 83:548 84:603 85:1213 86:774 87:934
88:342 89:1682 90:291 91:4794 92:529 93:1652
94:1514 95:896 96:368 97:315 98:914 99:37
100:7 101:189 103:1049 106:102 107:192 108:282
109:1692 110:769 111:920 112:455 113:599 114:652
115:809 116:937 117:720 118:926 119:1232 120:357
121:716 122:1676 123:1112 124:1390 125:1249 128:562
129:197 130:258 131:622 132:179 133:22 134:248
135:62 136:215 137:177 138:356 139:178 140:494
141:248 142:410 143:438 144:522 145:70 146:501
147:293 148:808 149:307 150:157 151:180 152:464
153:172 154:12 155:416 156:217 157:377 158:176
159:543 160:338 161:260 162:348 163:191 164:585
165:419 166:573 167:467 168:822 169:129 170:861
171:127 172:2 173:1783 174:594 175:449 176:684
177:705 178:1367 180:1238 181:82 182:963 183:292
184:481 185:1 186:2278 187:1068 188:1227 189:1802
190:5555 192:6047 193:5579 194:4694 195:3686 196:1287
197:134 198:3675 199:4592 200:5841 201:1943 202:8577
203:8658 204:4342 205:2506 206:2772 207:2812 208:4081
209:3656 210:2760 211:1492 212:2057 213:1956 214:853
215:104 216:5155 217:1548 218:546 219:333 220:1239
221:559 222:202

End of report
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