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 3, 2011

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Wed 04 May, 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: 360754
Prefixes after maximum aggregation: 162498
Deaggregation factor: 2.22
Unique aggregates announced to Internet: 175783
Total ASes present in the Internet Routing Table: 37455
Prefixes per ASN: 9.63
Origin-only ASes present in the Internet Routing Table: 31360
Origin ASes announcing only one prefix: 15020
Transit ASes present in the Internet Routing Table: 5054
Transit-only ASes present in the Internet Routing Table: 120
Average AS path length visible in the Internet Routing Table: 4.3
Max AS path length visible: 25
Max AS path prepend of ASN (32374) 19
Prefixes from unregistered ASNs in the Routing Table: 3065
Unregistered ASNs in the Routing Table: 318
Number of 32-bit ASNs allocated by the RIRs: 1321
Number of 32-bit ASNs visible in the Routing Table: 1041
Prefixes from 32-bit ASNs in the Routing Table: 2361
Special use prefixes present in the Routing Table: 76
Prefixes being announced from unallocated address space: 156
Number of addresses announced to Internet: 2423079929
Equivalent to 144 /8s, 109 /16s and 67 /24s
Percentage of available address space announced: 65.4
Percentage of allocated address space announced: 65.4
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 90.6
Total number of prefixes smaller than registry allocations: 149608

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

Prefixes being announced by APNIC Region ASes: 86995
Total APNIC prefixes after maximum aggregation: 28826
APNIC Deaggregation factor: 3.02
Prefixes being announced from the APNIC address blocks: 83539
Unique aggregates announced from the APNIC address blocks: 36967
APNIC Region origin ASes present in the Internet Routing Table: 4409
APNIC Prefixes per ASN: 18.95
APNIC Region origin ASes announcing only one prefix: 1236
APNIC Region transit ASes present in the Internet Routing Table: 692
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: 48
Number of APNIC addresses announced to Internet: 612712385
Equivalent to 36 /8s, 133 /16s and 63 /24s
Percentage of available APNIC address space announced: 77.7

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: 143314
Total ARIN prefixes after maximum aggregation: 73376
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 115318
Unique aggregates announced from the ARIN address blocks: 45213
ARIN Region origin ASes present in the Internet Routing Table: 14361
ARIN Prefixes per ASN: 8.03
ARIN Region origin ASes announcing only one prefix: 5472
ARIN Region transit ASes present in the Internet Routing Table: 1461
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 23
Number of ARIN region 32-bit ASNs visible in the Routing Table: 12
Number of ARIN addresses announced to Internet: 799813656
Equivalent to 47 /8s, 172 /16s and 48 /24s
Percentage of available ARIN address space announced: 63.6

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: 87166
Total RIPE prefixes after maximum aggregation: 48269
RIPE Deaggregation factor: 1.81
Prefixes being announced from the RIPE address blocks: 79797
Unique aggregates announced from the RIPE address blocks: 50885
RIPE Region origin ASes present in the Internet Routing Table: 15580
RIPE Prefixes per ASN: 5.12
RIPE Region origin ASes announcing only one prefix: 7754
RIPE Region transit ASes present in the Internet Routing Table: 2468
Average RIPE Region AS path length visible: 4.0
Max RIPE Region AS path length visible: 24
Number of RIPE region 32-bit ASNs visible in the Routing Table: 773
Number of RIPE addresses announced to Internet: 468099708
Equivalent to 27 /8s, 230 /16s and 162 /24s
Percentage of available RIPE address space announced: 75.4

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: 32807
Total LACNIC prefixes after maximum aggregation: 7518
LACNIC Deaggregation factor: 4.36
Prefixes being announced from the LACNIC address blocks: 31841
Unique aggregates announced from the LACNIC address blocks: 16596
LACNIC Region origin ASes present in the Internet Routing Table: 1446
LACNIC Prefixes per ASN: 22.02
LACNIC Region origin ASes announcing only one prefix: 424
LACNIC Region transit ASes present in the Internet Routing Table: 263
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: 203
Number of LACNIC addresses announced to Internet: 83047948
Equivalent to 4 /8s, 243 /16s and 54 /24s
Percentage of available LACNIC address space announced: 55.0

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: 7804
Total AfriNIC prefixes after maximum aggregation: 1859
AfriNIC Deaggregation factor: 4.20
Prefixes being announced from the AfriNIC address blocks: 6152
Unique aggregates announced from the AfriNIC address blocks: 1904
AfriNIC Region origin ASes present in the Internet Routing Table: 447
AfriNIC Prefixes per ASN: 13.76
AfriNIC Region origin ASes announcing only one prefix: 134
AfriNIC Region transit ASes present in the Internet Routing Table: 96
Average AfriNIC Region AS path length visible: 4.4
Max AfriNIC Region AS path length visible: 19
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 23416576
Equivalent to 1 /8s, 101 /16s and 79 /24s
Percentage of available AfriNIC address space announced: 34.9

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 1875 9498 603 Korea Telecom (KIX)
17974 1802 507 30 PT TELEKOMUNIKASI INDONESIA
7545 1517 301 81 TPG Internet Pty Ltd
4755 1458 374 164 Videsh Sanchar Nigam Ltd. Aut
7552 1210 1064 7 Vietel Corporation
24560 1152 336 184 Bharti Airtel Ltd.
9583 1057 77 492 Sify Limited
9829 1008 874 51 BSNL National Internet Backbo
17488 960 165 100 Hathway IP Over Cable Interne
4808 955 2026 277 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 3647 3822 256 bellsouth.net, inc.
4323 2596 1103 398 Time Warner Telecom
18566 1791 349 229 Covad Communications
1785 1788 681 127 AppliedTheory Corporation
6478 1660 312 48 AT&T Worldnet Services
20115 1586 1556 639 Charter Communications
19262 1482 4920 329 Verizon Global Networks
7018 1358 6927 891 AT&T WorldNet Services
22773 1302 2865 85 Cox Communications, Inc.
2386 1270 535 912 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 1023 798 175 KPNQwest Backbone AS
9116 540 326 30 Goldenlines main autonomous s
6830 520 1780 321 UPC Distribution Services
3292 517 1997 391 TDC Tele Danmark
34984 509 106 182 Tellcom Iletisim Hizmetleri
29049 450 33 48 AzerSat LLC.
20940 448 131 342 Akamai Technologies European
8866 443 134 26 Bulgarian Telecommunication C
3320 422 7609 367 Deutsche Telekom AG
12479 408 577 6 Uni2 Autonomous System

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 1456 270 155 TVCABLE BOGOTA
8151 1368 2679 362 Uninet S.A. de C.V.
28573 1294 990 88 Types of queries are: POCs, o
7303 927 467 149 Telecom Argentina Stet-France
6503 801 354 74 AVANTEL, S.A.
14420 665 53 91 Types of queries are: POCs, o
22047 564 310 15 Types of queries are: POCs, o
3816 518 226 98 COLOMBIA TELECOMUNICACIONES S
11172 495 100 84 Alestra
14117 492 46 43 Telefonica del Sur 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
8452 884 445 11 TEDATA
24863 781 147 38 LINKdotNET AS number
15475 428 90 8 Nile Online
36992 296 415 13 Etisalat MISR
3741 267 985 227 The Internet Solution
6713 240 215 13 Itissalat Al-MAGHRIB
33776 213 12 12 Starcomms Nigeria Limited
24835 209 78 10 RAYA Telecom - Egypt
29571 161 17 11 Ci Telecom Autonomous system
16637 151 441 86 Johnnic e-Ventures

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 3647 3822 256 bellsouth.net, inc.
4323 2596 1103 398 Time Warner Telecom
23456 2361 665 1278 >>UNKNOWN<<
4766 1875 9498 603 Korea Telecom (KIX)
17974 1802 507 30 PT TELEKOMUNIKASI INDONESIA
18566 1791 349 229 Covad Communications
1785 1788 681 127 AppliedTheory Corporation
6478 1660 312 48 AT&T Worldnet Services
20115 1586 1556 639 Charter Communications
7545 1517 301 81 TPG Internet Pty Ltd

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

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

ASN No of nets Net Savings Description
4323 2596 2198 Time Warner Telecom
17974 1802 1772 PT TELEKOMUNIKASI INDONESIA
1785 1788 1661 AppliedTheory Corporation
6478 1660 1612 AT&T Worldnet Services
18566 1791 1562 Covad Communications
7545 1517 1436 TPG Internet Pty Ltd
10620 1456 1301 TVCABLE BOGOTA
4755 1458 1294 Videsh Sanchar Nigam Ltd. Aut
4766 1875 1272 Korea Telecom (KIX)
11492 1260 1245 Cable One

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 7018 AT&T WorldNet Servic
26973 UNALLOCATED 12.39.154.0/23 7018 AT&T WorldNet Servic
26973 UNALLOCATED 12.39.155.0/24 7018 AT&T WorldNet Servic
26973 UNALLOCATED 12.39.159.0/24 7018 AT&T WorldNet Servic
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
24.52.176.0/20 7065 Sonoma Interconnect
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
31.208.0.0/16 29518 Labs2
31.209.0.0/18 29518 Labs2
31.209.64.0/21 29625 Elekta

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 /10:28 /11:78 /12:222
/13:459 /14:795 /15:1415 /16:11802 /17:6014 /18:9955
/19:19726 /20:26300 /21:26119 /22:34319 /23:33214 /24:187600
/25:378 /26:348 /27:172 /28:283 /29:182 /30:605
/31:64 /32:643

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

ASN No of nets Total ann. Description
6389 2247 3647 bellsouth.net, inc.
18566 1759 1791 Covad Communications
6478 1614 1660 AT&T Worldnet Services
10620 1346 1456 TVCABLE BOGOTA
4323 1302 2596 Time Warner Telecom
11492 1209 1260 Cable One
23456 1190 2361 >>UNKNOWN<<
7011 1062 1162 Citizens Utilities
1785 1054 1788 AppliedTheory Corporation
286 883 1023 KPNQwest Backbone AS

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

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

1:265 2:71 4:18 5:1 6:3 8:354
9:1 12:1992 13:1 14:448 15:15 16:3
17:8 20:10 23:5 24:1634 27:732 31:237
32:126 33:3 34:2 37:1 38:766 40:101
41:2480 42:4 44:3 46:892 47:4 49:169
50:383 52:13 55:5 56:2 57:40 58:845
59:485 60:374 61:1270 62:1008 63:1940 64:3970
65:2321 66:4375 67:1894 68:1256 69:3068 70:745
71:351 72:1923 73:3 74:2419 75:315 76:346
77:873 78:693 79:475 80:1105 81:818 82:510
83:456 84:663 85:1089 86:611 87:775 88:329
89:1632 90:183 91:3721 92:513 93:1069 94:1293
95:805 96:478 97:255 98:847 99:35 101:71
103:9 106:1 107:8 108:83 109:956 110:562
111:701 112:318 113:403 114:526 115:687 116:970
117:676 118:812 119:1138 120:302 121:676 122:1618
123:1078 124:1255 125:1219 128:261 129:166 130:172
131:566 132:110 133:19 134:219 135:49 136:214
137:142 138:303 139:125 140:484 141:239 142:403
143:402 144:487 145:52 146:442 147:218 148:597
149:243 150:171 151:187 152:310 153:179 154:3
155:396 156:190 157:354 158:132 159:383 160:314
161:207 162:279 163:164 164:480 165:366 166:511
167:427 168:719 169:154 170:789 171:76 172:1
173:1559 174:540 175:363 177:92 178:877 180:818
181:16 182:439 183:205 184:337 185:1 186:1150
187:805 188:845 189:943 190:4855 192:5825 193:4865
194:3526 195:3108 196:1209 197:15 198:3573 199:3939
200:5536 201:1523 202:8354 203:8428 204:4144 205:2328
206:2774 207:3055 208:3966 209:3496 210:2733 211:1386
212:2034 213:1763 214:725 215:68 216:4904 217:1657
218:567 219:375 220:1205 221:486 222:342 223:144


End of report
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