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, July 28, 2011

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Fri 29 Jul, 2011

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: 371288
Prefixes after maximum aggregation: 167224
Deaggregation factor: 2.22
Unique aggregates announced to Internet: 181164
Total ASes present in the Internet Routing Table: 38337
Prefixes per ASN: 9.68
Origin-only ASes present in the Internet Routing Table: 31826
Origin ASes announcing only one prefix: 15259
Transit ASes present in the Internet Routing Table: 5217
Transit-only ASes present in the Internet Routing Table: 132
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 35
Max AS path prepend of ASN (22394) 31
Prefixes from unregistered ASNs in the Routing Table: 4120
Unregistered ASNs in the Routing Table: 595
Number of 32-bit ASNs allocated by the RIRs: 1600
Number of 32-bit ASNs visible in the Routing Table: 1294
Prefixes from 32-bit ASNs in the Routing Table: 2975
Special use prefixes present in the Routing Table: 78
Prefixes being announced from unallocated address space: 119
Number of addresses announced to Internet: 2487745415
Equivalent to 148 /8s, 71 /16s and 251 /24s
Percentage of available address space announced: 67.1
Percentage of allocated address space announced: 67.1
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 91.2
Total number of prefixes smaller than registry allocations: 154506

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

Prefixes being announced by APNIC Region ASes: 89380
Total APNIC prefixes after maximum aggregation: 29304
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 86132
Unique aggregates announced from the APNIC address blocks: 37420
APNIC Region origin ASes present in the Internet Routing Table: 4507
APNIC Prefixes per ASN: 19.11
APNIC Region origin ASes announcing only one prefix: 1262
APNIC Region transit ASes present in the Internet Routing Table: 708
Average APNIC Region AS path length visible: 5.0
Max APNIC Region AS path length visible: 21
Number of APNIC region 32-bit ASNs visible in the Routing Table: 64
Number of APNIC addresses announced to Internet: 622356225
Equivalent to 37 /8s, 24 /16s and 103 /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, 131072-132095
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: 145539
Total ARIN prefixes after maximum aggregation: 75162
ARIN Deaggregation factor: 1.94
Prefixes being announced from the ARIN address blocks: 116999
Unique aggregates announced from the ARIN address blocks: 46714
ARIN Region origin ASes present in the Internet Routing Table: 14528
ARIN Prefixes per ASN: 8.05
ARIN Region origin ASes announcing only one prefix: 5557
ARIN Region transit ASes present in the Internet Routing Table: 1498
Average ARIN Region AS path length visible: 4.3
Max ARIN Region AS path length visible: 35
Number of ARIN region 32-bit ASNs visible in the Routing Table: 12
Number of ARIN addresses announced to Internet: 802998680
Equivalent to 47 /8s, 220 /16s and 201 /24s
Percentage of available ARIN address space announced: 63.8

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: 90225
Total RIPE prefixes after maximum aggregation: 49805
RIPE Deaggregation factor: 1.81
Prefixes being announced from the RIPE address blocks: 82825
Unique aggregates announced from the RIPE address blocks: 52865
RIPE Region origin ASes present in the Internet Routing Table: 15859
RIPE Prefixes per ASN: 5.22
RIPE Region origin ASes announcing only one prefix: 7848
RIPE Region transit ASes present in the Internet Routing Table: 2555
Average RIPE Region AS path length visible: 4.0
Max RIPE Region AS path length visible: 25
Number of RIPE region 32-bit ASNs visible in the Routing Table: 939
Number of RIPE addresses announced to Internet: 485066828
Equivalent to 28 /8s, 233 /16s and 136 /24s
Percentage of available RIPE address space announced: 78.1

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: 34464
Total LACNIC prefixes after maximum aggregation: 7688
LACNIC Deaggregation factor: 4.48
Prefixes being announced from the LACNIC address blocks: 33634
Unique aggregates announced from the LACNIC address blocks: 17293
LACNIC Region origin ASes present in the Internet Routing Table: 1492
LACNIC Prefixes per ASN: 22.54
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 274
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 275
Number of LACNIC addresses announced to Internet: 87084552
Equivalent to 5 /8s, 48 /16s and 206 /24s
Percentage of available LACNIC address space announced: 57.7

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: 8392
Total AfriNIC prefixes after maximum aggregation: 1982
AfriNIC Deaggregation factor: 4.23
Prefixes being announced from the AfriNIC address blocks: 6473
Unique aggregates announced from the AfriNIC address blocks: 2021
AfriNIC Region origin ASes present in the Internet Routing Table: 477
AfriNIC Prefixes per ASN: 13.57
AfriNIC Region origin ASes announcing only one prefix: 153
AfriNIC Region transit ASes present in the Internet Routing Table: 104
Average AfriNIC Region AS path length visible: 4.4
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 4
Number of AfriNIC addresses announced to Internet: 25827584
Equivalent to 1 /8s, 138 /16s and 25 /24s
Percentage of available AfriNIC address space announced: 38.5

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 1924 11053 643 Korea Telecom (KIX)
17974 1783 508 32 PT TELEKOMUNIKASI INDONESIA
7545 1559 301 86 TPG Internet Pty Ltd
4755 1510 375 171 Videsh Sanchar Nigam Ltd. Aut
7552 1265 1064 7 Vietel Corporation
24560 1193 336 187 Bharti Airtel Ltd.
9829 1114 929 42 BSNL National Internet Backbo
9583 1075 80 510 Sify Limited
17488 981 188 113 Hathway IP Over Cable Interne
4808 959 2016 274 CNCGROUP IP network: China169

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 3616 3818 237 bellsouth.net, inc.
18566 1957 372 223 Covad Communications
1785 1813 681 121 AppliedTheory Corporation
7029 1648 1031 209 Windstream Communications Inc
4323 1615 1098 402 Time Warner Telecom
20115 1591 1538 623 Charter Communications
19262 1412 4760 392 Verizon Global Networks
22773 1405 2900 90 Cox Communications, Inc.
7018 1367 7085 894 AT&T WorldNet Services
2386 1258 520 906 AT&T Data Communications Serv

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
286 1032 797 186 KPNQwest Backbone AS
9116 540 326 31 Goldenlines main autonomous s
34984 534 106 185 Tellcom Iletisim Hizmetleri
3292 519 2078 403 TDC Tele Danmark
6830 514 1788 317 UPC Distribution Services
20940 468 134 359 Akamai Technologies European
8866 457 133 26 Bulgarian Telecommunication C
12479 455 593 7 Uni2 Autonomous System
29049 431 31 49 AzerSat LLC.
3320 424 8151 370 Deutsche Telekom AG

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 1565 288 167 TVCABLE BOGOTA
8151 1433 2730 357 Uninet S.A. de C.V.
28573 1283 996 67 Types of queries are: POCs, o
7303 1034 545 175 Telecom Argentina Stet-France
6503 755 450 69 AVANTEL, S.A.
14420 701 56 82 Types of queries are: POCs, o
22047 578 322 17 Types of queries are: POCs, o
10481 548 430 20 Prima S.A.
3816 534 232 96 COLOMBIA TELECOMUNICACIONES S
27947 522 53 54 Telconet S.A

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
24863 798 147 35 LINKdotNET AS number
8452 793 445 11 TEDATA
15475 510 74 8 Nile Online
16637 304 441 87 Johnnic e-Ventures
3741 266 937 227 The Internet Solution
6713 260 519 14 Itissalat Al-MAGHRIB
36992 259 415 15 Etisalat MISR
33776 227 13 6 Starcomms Nigeria Limited
24835 177 78 10 RAYA Telecom - Egypt
29571 158 17 11 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 3616 3818 237 bellsouth.net, inc.
23456 2975 717 1599 >>UNKNOWN<<
18566 1957 372 223 Covad Communications
4766 1924 11053 643 Korea Telecom (KIX)
1785 1813 681 121 AppliedTheory Corporation
17974 1783 508 32 PT TELEKOMUNIKASI INDONESIA
7029 1648 1031 209 Windstream Communications Inc
4323 1615 1098 402 Time Warner Telecom
20115 1591 1538 623 Charter Communications
10620 1565 288 167 TVCABLE BOGOTA

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

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

ASN No of nets Net Savings Description
17974 1783 1751 PT TELEKOMUNIKASI INDONESIA
18566 1957 1734 Covad Communications
1785 1813 1692 AppliedTheory Corporation
7545 1559 1473 TPG Internet Pty Ltd
7029 1648 1439 Windstream Communications Inc
10620 1565 1398 TVCABLE BOGOTA
23456 2975 1376 >>UNKNOWN<<
4755 1510 1339 Videsh Sanchar Nigam Ltd. Aut
22773 1405 1315 Cox Communications, Inc.
4766 1924 1281 Korea Telecom (KIX)

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

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

Bad AS Designation Network Transit AS Description
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
26973 UNALLOCATED 12.39.152.0/24 1239 Sprint
26973 UNALLOCATED 12.39.154.0/23 1239 Sprint
26973 UNALLOCATED 12.39.155.0/24 1239 Sprint
26973 UNALLOCATED 12.39.159.0/24 1239 Sprint
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
10.29.244.56/29 286 KPNQwest Backbone AS
10.29.245.1/32 286 KPNQwest Backbone AS
10.29.245.2/32 286 KPNQwest Backbone AS
10.29.245.15/32 286 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

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

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

Network Origin AS Description
24.225.128.0/18 36377 Comcast Telecommunications, I
24.225.192.0/23 36377 Comcast Telecommunications, I
24.225.192.0/18 36377 Comcast Telecommunications, I
24.225.224.0/21 36377 Comcast Telecommunications, I
24.225.237.0/24 36377 Comcast Telecommunications, I
24.225.248.0/21 36377 Comcast Telecommunications, I
41.222.79.0/24 36938 >>UNKNOWN<<
41.223.92.0/22 36936 >>UNKNOWN<<
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless

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 /8:21 /9:12 /10:27 /11:80 /12:232
/13:465 /14:805 /15:1434 /16:12164 /17:6143 /18:10111
/19:20066 /20:27393 /21:26915 /22:35473 /23:34624 /24:192378
/25:386 /26:344 /27:179 /28:362 /29:280 /30:699
/31:63 /32:632

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

ASN No of nets Total ann. Description
6389 2238 3616 bellsouth.net, inc.
18566 1907 1957 Covad Communications
23456 1466 2975 >>UNKNOWN<<
10620 1460 1565 TVCABLE BOGOTA
7029 1326 1648 Windstream Communications Inc
11492 1094 1140 Cable One
7011 1056 1158 Citizens Utilities
1785 1053 1813 AppliedTheory Corporation
6478 968 996 AT&T Worldnet Services
22773 904 1405 Cox Communications, Inc.

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

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

1:340 2:71 4:20 5:1 6:3 8:339
12:1967 13:1 14:496 15:15 16:3 17:5
20:10 23:18 24:1683 27:840 31:514 32:149
33:4 34:2 36:4 38:731 40:104 41:2555
42:36 44:3 46:1059 47:3 49:204 50:376
52:13 54:2 55:5 56:2 57:44 58:867
59:487 60:378 61:1188 62:1071 63:1951 64:4053
65:2301 66:3949 67:1923 68:1290 69:3169 70:824
71:373 72:1904 73:1 74:2488 75:340 76:349
77:905 78:713 79:490 80:1128 81:881 82:519
83:472 84:701 85:1087 86:538 87:783 88:340
89:1577 90:224 91:4001 92:529 93:1077 94:1360
95:881 96:425 97:264 98:930 99:37 101:81
103:157 106:14 107:26 108:81 109:1038 110:618
111:717 112:304 113:407 114:563 115:685 116:1003
117:682 118:858 119:1177 120:313 121:695 122:1609
123:980 124:1312 125:1330 128:247 129:172 130:170
131:581 132:113 133:21 134:215 135:52 136:215
137:138 138:300 139:128 140:479 141:255 142:406
143:423 144:480 145:56 146:455 147:225 148:674
149:250 150:166 151:189 152:342 153:182 154:5
155:400 156:199 157:356 158:140 159:452 160:315
161:205 162:311 163:166 164:507 165:399 166:535
167:435 168:746 169:154 170:838 171:81 172:1
173:1634 174:612 175:388 176:146 177:184 178:1008
180:922 181:25 182:515 183:232 184:343 185:1
186:1318 187:764 188:899 189:958 190:5045 192:5947
193:5018 194:3575 195:3234 196:1214 197:46 198:3595
199:4005 200:5582 201:1470 202:8421 203:8465 204:4245
205:2333 206:2730 207:2814 208:4121 209:3527 210:2690
211:1458 212:2146 213:1847 214:784 215:69 216:4959
217:1644 218:550 219:358 220:1236 221:495 222:360
223:227

End of report
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