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, September 22, 2011

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Fri 23 Sep, 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: 377687
Prefixes after maximum aggregation: 169241
Deaggregation factor: 2.23
Unique aggregates announced to Internet: 185048
Total ASes present in the Internet Routing Table: 38870
Prefixes per ASN: 9.72
Origin-only ASes present in the Internet Routing Table: 32240
Origin ASes announcing only one prefix: 15489
Transit ASes present in the Internet Routing Table: 5206
Transit-only ASes present in the Internet Routing Table: 139
Average AS path length visible in the Internet Routing Table: 4.0
Max AS path length visible: 32
Max AS path prepend of ASN (36992) 22
Prefixes from unregistered ASNs in the Routing Table: 4644
Unregistered ASNs in the Routing Table: 771
Number of 32-bit ASNs allocated by the RIRs: 1757
Number of 32-bit ASNs visible in the Routing Table: 1424
Prefixes from 32-bit ASNs in the Routing Table: 3274
Special use prefixes present in the Routing Table: 82
Prefixes being announced from unallocated address space: 99
Number of addresses announced to Internet: 2480146070
Equivalent to 147 /8s, 212 /16s and 6 /24s
Percentage of available address space announced: 66.9
Percentage of allocated address space announced: 66.9
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 91.4
Total number of prefixes smaller than registry allocations: 156787

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

Prefixes being announced by APNIC Region ASes: 92014
Total APNIC prefixes after maximum aggregation: 29569
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 88640
Unique aggregates announced from the APNIC address blocks: 38156
APNIC Region origin ASes present in the Internet Routing Table: 4559
APNIC Prefixes per ASN: 19.44
APNIC Region origin ASes announcing only one prefix: 1268
APNIC Region transit ASes present in the Internet Routing Table: 714
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: 88
Number of APNIC addresses announced to Internet: 628076800
Equivalent to 37 /8s, 111 /16s and 177 /24s
Percentage of available APNIC address space announced: 79.7

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: 147221
Total ARIN prefixes after maximum aggregation: 75840
ARIN Deaggregation factor: 1.94
Prefixes being announced from the ARIN address blocks: 118986
Unique aggregates announced from the ARIN address blocks: 47955
ARIN Region origin ASes present in the Internet Routing Table: 14695
ARIN Prefixes per ASN: 8.10
ARIN Region origin ASes announcing only one prefix: 5651
ARIN Region transit ASes present in the Internet Routing Table: 1533
Average ARIN Region AS path length visible: 3.5
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 12
Number of ARIN addresses announced to Internet: 804947356
Equivalent to 47 /8s, 250 /16s and 133 /24s
Percentage of available ARIN address space announced: 64.0

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: 91046
Total RIPE prefixes after maximum aggregation: 50398
RIPE Deaggregation factor: 1.81
Prefixes being announced from the RIPE address blocks: 82989
Unique aggregates announced from the RIPE address blocks: 54008
RIPE Region origin ASes present in the Internet Routing Table: 15993
RIPE Prefixes per ASN: 5.19
RIPE Region origin ASes announcing only one prefix: 7963
RIPE Region transit ASes present in the Internet Routing Table: 2525
Average RIPE Region AS path length visible: 4.3
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1010
Number of RIPE addresses announced to Internet: 489946828
Equivalent to 29 /8s, 51 /16s and 254 /24s
Percentage of available RIPE address space announced: 78.9

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: 35519
Total LACNIC prefixes after maximum aggregation: 7802
LACNIC Deaggregation factor: 4.55
Prefixes being announced from the LACNIC address blocks: 34714
Unique aggregates announced from the LACNIC address blocks: 17918
LACNIC Region origin ASes present in the Internet Routing Table: 1526
LACNIC Prefixes per ASN: 22.75
LACNIC Region origin ASes announcing only one prefix: 452
LACNIC Region transit ASes present in the Internet Routing Table: 271
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 20
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 311
Number of LACNIC addresses announced to Internet: 89224200
Equivalent to 5 /8s, 81 /16s and 116 /24s
Percentage of available LACNIC address space announced: 59.1

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: 8416
Total AfriNIC prefixes after maximum aggregation: 2008
AfriNIC Deaggregation factor: 4.19
Prefixes being announced from the AfriNIC address blocks: 6523
Unique aggregates announced from the AfriNIC address blocks: 1984
AfriNIC Region origin ASes present in the Internet Routing Table: 486
AfriNIC Prefixes per ASN: 13.42
AfriNIC Region origin ASes announcing only one prefix: 155
AfriNIC Region transit ASes present in the Internet Routing Table: 102
Average AfriNIC Region AS path length visible: 3.8
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 3
Number of AfriNIC addresses announced to Internet: 27331328
Equivalent to 1 /8s, 161 /16s and 11 /24s
Percentage of available AfriNIC address space announced: 40.7

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
17974 1991 516 31 PT TELEKOMUNIKASI INDONESIA
4766 1941 11056 650 Korea Telecom (KIX)
7545 1596 303 86 TPG Internet Pty Ltd
4755 1550 634 165 Videsh Sanchar Nigam Ltd. Aut
7552 1416 1064 7 Vietel Corporation
24560 1182 337 194 Bharti Airtel Ltd.
9829 1158 989 28 BSNL National Internet Backbo
4808 1093 2125 311 CNCGROUP IP network: China169
9583 1084 80 501 Sify Limited
17488 951 188 160 Hathway IP Over Cable Interne

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 3561 3817 226 bellsouth.net, inc.
18566 1913 365 238 Covad Communications
1785 1826 680 124 AppliedTheory Corporation
7029 1722 1018 218 Windstream Communications Inc
4323 1626 1101 394 Time Warner Telecom
20115 1596 1543 633 Charter Communications
22773 1462 2907 99 Cox Communications, Inc.
30036 1418 263 679 Mediacom Communications Corp
19262 1395 4726 403 Verizon Global Networks
7018 1337 7051 874 AT&T WorldNet Services

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 1064 824 199 KPNQwest Backbone AS
8402 741 352 13 Corbina telecom
34984 566 108 181 Tellcom Iletisim Hizmetleri
20940 549 184 424 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
6830 534 1813 325 UPC Distribution Services
3292 528 2082 407 TDC Tele Danmark
3320 493 8167 381 Deutsche Telekom AG
12479 474 594 8 Uni2 Autonomous System
8866 462 133 26 Bulgarian Telecommunication C

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 1679 309 156 TVCABLE BOGOTA
8151 1461 2806 349 Uninet S.A. de C.V.
28573 1335 1013 70 Types of queries are: POCs, o
7303 1156 678 170 Telecom Argentina Stet-France
14420 734 58 88 Types of queries are: POCs, o
6503 591 450 70 AVANTEL, S.A.
27947 582 56 76 Telconet S.A
22047 580 322 17 Types of queries are: POCs, o
10481 548 430 20 Prima S.A.
3816 535 232 98 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
24863 812 147 43 LINKdotNET AS number
8452 708 445 11 TEDATA
15475 451 74 8 Nile Online
36992 293 415 14 Etisalat MISR
3741 274 938 229 The Internet Solution
15706 244 32 6 Sudatel Internet Exchange Aut
6713 242 519 14 Itissalat Al-MAGHRIB
33776 239 13 8 Starcomms Nigeria Limited
12258 199 28 59 YEBO-AS
29571 190 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 3561 3817 226 bellsouth.net, inc.
23456 3274 775 1769 >>UNKNOWN<<
17974 1991 516 31 PT TELEKOMUNIKASI INDONESIA
4766 1941 11056 650 Korea Telecom (KIX)
18566 1913 365 238 Covad Communications
1785 1826 680 124 AppliedTheory Corporation
7029 1722 1018 218 Windstream Communications Inc
10620 1679 309 156 TVCABLE BOGOTA
4323 1626 1101 394 Time Warner Telecom
7545 1596 303 86 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
17974 1991 1960 PT TELEKOMUNIKASI INDONESIA
1785 1826 1702 AppliedTheory Corporation
18566 1913 1675 Covad Communications
10620 1679 1523 TVCABLE BOGOTA
7545 1596 1510 TPG Internet Pty Ltd
23456 3274 1505 >>UNKNOWN<<
7029 1722 1504 Windstream Communications Inc
7552 1416 1409 Vietel Corporation
4755 1550 1385 Videsh Sanchar Nigam Ltd. Aut
22773 1462 1363 Cox Communications, Inc.

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 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<<
46.18.104.0/21 23456 >>UNKNOWN<<
50.115.224.0/20 27257 Webair Internet Development I

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 /10:27 /11:81 /12:235
/13:464 /14:808 /15:1450 /16:12100 /17:6243 /18:10333
/19:20356 /20:28225 /21:27536 /22:36892 /23:35447 /24:195647
/25:74 /26:89 /27:123 /28:297 /29:105 /30:556
/31:73 /32:495

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

ASN No of nets Total ann. Description
6389 2198 3561 bellsouth.net, inc.
18566 1869 1913 Covad Communications
10620 1574 1679 TVCABLE BOGOTA
23456 1563 3274 >>UNKNOWN<<
7029 1411 1722 Windstream Communications Inc
30036 1375 1418 Mediacom Communications Corp
11492 1113 1151 Cable One
7011 1058 1183 Citizens Utilities
1785 1053 1826 AppliedTheory Corporation
22773 951 1462 Cox Communications, Inc.

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

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

1:382 2:198 4:19 5:1 6:3 8:353
12:1960 13:1 14:543 15:13 16:3 17:7
20:10 23:35 24:1686 27:943 31:543 32:149
33:4 34:2 36:4 38:745 40:108 41:2565
42:48 44:3 46:994 47:3 49:250 50:422
52:13 54:2 55:7 56:2 57:45 58:882
59:492 60:376 61:1182 62:1101 63:1962 64:4103
65:2306 66:4014 67:1980 68:1290 69:3305 70:862
71:377 72:1888 73:1 74:2512 75:361 76:349
77:872 78:745 79:490 80:1118 81:843 82:517
83:525 84:638 85:1091 86:416 87:875 88:357
89:1568 90:268 91:4124 92:533 93:1249 94:1328
95:857 96:440 97:275 98:947 99:37 101:209
103:314 106:70 107:52 108:82 109:1038 110:669
111:783 112:322 113:444 114:568 115:696 116:918
117:711 118:900 119:1214 120:333 121:703 122:1605
123:1008 124:1359 125:1393 128:245 129:181 130:166
131:579 132:120 133:21 134:217 135:53 136:212
137:139 138:288 139:122 140:493 141:279 142:391
143:409 144:482 145:60 146:472 147:226 148:694
149:258 150:153 151:191 152:448 153:177 154:6
155:394 156:203 157:360 158:145 159:462 160:325
161:207 162:339 163:177 164:507 165:403 166:537
167:435 168:750 169:147 170:860 171:84 172:1
173:1671 174:658 175:409 176:203 177:276 178:1016
180:1090 181:30 182:630 183:219 184:383 185:1
186:1456 187:672 188:945 189:851 190:5164 192:5943
193:5028 194:3553 195:3088 196:1231 197:176 198:3600
199:4136 200:5526 201:1639 202:8549 203:8498 204:4263
205:2358 206:2739 207:2841 208:4153 209:3557 210:2729
211:1471 212:2133 213:1785 214:778 215:76 216:4937
217:1609 218:555 219:340 220:1230 221:514 222:343
223:264

End of report
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