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.

Monday, April 2, 2012

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Tue 03 Apr, 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: 407314
Prefixes after maximum aggregation: 173076
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 195955
Total ASes present in the Internet Routing Table: 40590
Prefixes per ASN: 10.03
Origin-only ASes present in the Internet Routing Table: 32951
Origin ASes announcing only one prefix: 15507
Transit ASes present in the Internet Routing Table: 5464
Transit-only ASes present in the Internet Routing Table: 144
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 28
Max AS path prepend of ASN (19202) 25
Prefixes from unregistered ASNs in the Routing Table: 5968
Unregistered ASNs in the Routing Table: 302
Number of 32-bit ASNs allocated by the RIRs: 2342
Number of 32-bit ASNs visible in the Routing Table: 2175
Prefixes from 32-bit ASNs in the Routing Table: 5353
Special use prefixes present in the Routing Table: 87
Prefixes being announced from unallocated address space: 1303
Number of addresses announced to Internet: 2532411733
Equivalent to 150 /8s, 241 /16s and 137 /24s
Percentage of available address space announced: 68.3
Percentage of allocated address space announced: 68.3
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 92.1
Total number of prefixes smaller than registry allocations: 171601

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

Prefixes being announced by APNIC Region ASes: 96880
Total APNIC prefixes after maximum aggregation: 31028
APNIC Deaggregation factor: 3.12
Prefixes being announced from the APNIC address blocks: 93378
Unique aggregates announced from the APNIC address blocks: 39212
APNIC Region origin ASes present in the Internet Routing Table: 4656
APNIC Prefixes per ASN: 20.06
APNIC Region origin ASes announcing only one prefix: 1249
APNIC Region transit ASes present in the Internet Routing Table: 748
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 169
Number of APNIC addresses announced to Internet: 642448640
Equivalent to 38 /8s, 74 /16s and 253 /24s
Percentage of available APNIC address space announced: 81.5

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: 151904
Total ARIN prefixes after maximum aggregation: 78038
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 123091
Unique aggregates announced from the ARIN address blocks: 49938
ARIN Region origin ASes present in the Internet Routing Table: 14969
ARIN Prefixes per ASN: 8.22
ARIN Region origin ASes announcing only one prefix: 5700
ARIN Region transit ASes present in the Internet Routing Table: 1570
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 28
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 805261312
Equivalent to 47 /8s, 255 /16s and 80 /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: 102896
Total RIPE prefixes after maximum aggregation: 53437
RIPE Deaggregation factor: 1.93
Prefixes being announced from the RIPE address blocks: 93286
Unique aggregates announced from the RIPE address blocks: 57269
RIPE Region origin ASes present in the Internet Routing Table: 16357
RIPE Prefixes per ASN: 5.70
RIPE Region origin ASes announcing only one prefix: 7955
RIPE Region transit ASes present in the Internet Routing Table: 2641
Average RIPE Region AS path length visible: 4.8
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1474
Number of RIPE addresses announced to Internet: 502381196
Equivalent to 29 /8s, 241 /16s and 186 /24s
Percentage of available RIPE address space announced: 80.9

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: 40937
Total LACNIC prefixes after maximum aggregation: 8175
LACNIC Deaggregation factor: 5.01
Prefixes being announced from the LACNIC address blocks: 40429
Unique aggregates announced from the LACNIC address blocks: 19699
LACNIC Region origin ASes present in the Internet Routing Table: 1571
LACNIC Prefixes per ASN: 25.73
LACNIC Region origin ASes announcing only one prefix: 441
LACNIC Region transit ASes present in the Internet Routing Table: 298
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 510
Number of LACNIC addresses announced to Internet: 98659592
Equivalent to 5 /8s, 225 /16s and 109 /24s
Percentage of available LACNIC address space announced: 65.3

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: 8889
Total AfriNIC prefixes after maximum aggregation: 2136
AfriNIC Deaggregation factor: 4.16
Prefixes being announced from the AfriNIC address blocks: 6942
Unique aggregates announced from the AfriNIC address blocks: 2165
AfriNIC Region origin ASes present in the Internet Routing Table: 524
AfriNIC Prefixes per ASN: 13.25
AfriNIC Region origin ASes announcing only one prefix: 162
AfriNIC Region transit ASes present in the Internet Routing Table: 117
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: 31521280
Equivalent to 1 /8s, 224 /16s and 250 /24s
Percentage of available AfriNIC address space announced: 47.0

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 1927 11101 677 Korea Telecom (KIX)
17974 1788 503 63 PT TELEKOMUNIKASI INDONESIA
7545 1652 301 88 TPG Internet Pty Ltd
4755 1575 386 158 Videsh Sanchar Nigam Ltd. Aut
9583 1241 95 543 Sify Limited
9829 1207 1025 29 BSNL National Internet Backbo
7552 1167 1062 11 Vietel Corporation
24560 1021 385 167 Bharti Airtel Ltd.
18101 951 131 160 Reliance Infocom Ltd Internet
9498 931 260 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 3376 3806 196 bellsouth.net, inc.
7029 3374 990 155 Windstream Communications Inc
18566 2092 383 179 Covad Communications
1785 1886 680 128 AppliedTheory Corporation
20115 1633 1559 624 Charter Communications
4323 1587 1074 376 Time Warner Telecom
22773 1552 2910 111 Cox Communications, Inc.
30036 1417 257 747 Mediacom Communications Corp
7018 1278 13742 828 AT&T WorldNet Services
11492 1184 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 1762 544 16 Corbina telecom
2118 1394 97 14 EUnet/RELCOM Autonomous Syste
286 1065 853 198 KPNQwest Backbone AS
31148 677 37 9 FreeNet ISP
34984 674 188 174 Tellcom Iletisim Hizmetleri
12479 656 658 57 Uni2 Autonomous System
6830 642 1943 413 UPC Distribution Services
20940 635 205 497 Akamai Technologies European
8551 598 360 81 Bezeq International
9116 541 326 32 Goldenlines main autonomous s

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 1797 327 163 TVCABLE BOGOTA
28573 1743 1105 60 Types of queries are: POCs, o
8151 1517 2999 326 Uninet S.A. de C.V.
6503 1511 418 66 AVANTEL, S.A.
7303 1353 827 189 Telecom Argentina Stet-France
26615 902 700 28 Types of queries are: POCs, o
27947 689 74 100 Telconet S.A
11172 636 91 73 Alestra
22047 584 326 15 Types of queries are: POCs, o
3816 569 242 101 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 1295 958 13 TEDATA
24863 849 274 35 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 272 924 229 The Internet Solution
12258 197 28 62 YEBO-AS
24835 178 80 8 RAYA Telecom - Egypt
15706 168 32 6 Sudatel Internet Exchange Aut
33776 167 12 24 Starcomms Nigeria Limited
16637 161 664 84 Johnnic e-Ventures
29571 159 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 3376 3806 196 bellsouth.net, inc.
7029 3374 990 155 Windstream Communications Inc
18566 2092 383 179 Covad Communications
4766 1927 11101 677 Korea Telecom (KIX)
1785 1886 680 128 AppliedTheory Corporation
10620 1797 327 163 TVCABLE BOGOTA
17974 1788 503 63 PT TELEKOMUNIKASI INDONESIA
8402 1762 544 16 Corbina telecom
28573 1743 1105 60 Types of queries are: POCs, o
7545 1652 301 88 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
7029 3374 3219 Windstream Communications Inc
18566 2092 1913 Covad Communications
1785 1886 1758 AppliedTheory Corporation
8402 1762 1746 Corbina telecom
17974 1788 1725 PT TELEKOMUNIKASI INDONESIA
28573 1743 1683 Types of queries are: POCs, o
10620 1797 1634 TVCABLE BOGOTA
7545 1652 1564 TPG Internet Pty Ltd
6503 1511 1445 AVANTEL, S.A.
22773 1552 1441 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
23456 UNALLOCATED 8.14.101.0/24 6461 AboveNet Communicati
54439 UNALLOCATED 8.25.174.0/24 17378 DBS International
54470 UNALLOCATED 8.30.171.0/24 3356 Level 3 Communicatio
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
17300 UNALLOCATED 12.45.103.0/24 209 Qwest

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
10.29.245.15/32 286 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
10.29.245.27/32 286 KPNQwest Backbone AS

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

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

Network Origin AS Description
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
23.27.0.0/20 54500 EGIHosting
23.27.16.0/20 54500 EGIHosting

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 /8:20 /9:12 /10:28 /11:81 /12:235
/13:457 /14:838 /15:1515 /16:12330 /17:6545 /18:10861
/19:21118 /20:29904 /21:30140 /22:40726 /23:38016 /24:212884
/25:69 /26:75 /27:106 /28:272 /29:101 /30:500
/31:20 /32:461

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

ASN No of nets Total ann. Description
7029 3036 3374 Windstream Communications Inc
6389 2093 3376 bellsouth.net, inc.
18566 2041 2092 Covad Communications
8402 1739 1762 Corbina telecom
10620 1690 1797 TVCABLE BOGOTA
30036 1361 1417 Mediacom Communications Corp
6503 1272 1511 AVANTEL, S.A.
11492 1147 1184 Cable One
8452 1104 1295 TEDATA
1785 1064 1886 AppliedTheory Corporation

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

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

1:538 2:680 4:18 6:3 8:396 12:1991
13:1 14:610 15:12 16:3 17:7 20:8
23:161 24:1765 27:1256 31:991 32:120 33:2
34:2 36:8 37:323 38:792 39:4 40:120
41:3047 42:133 44:3 46:1467 47:3 49:355
50:538 52:13 54:6 55:9 56:3 57:39
58:966 59:494 60:279 61:1216 62:989 63:2011
64:4191 65:2259 66:4521 67:2060 68:1332 69:3287
70:956 71:466 72:1846 73:1 74:2634 75:505
76:325 77:962 78:1008 79:502 80:1215 81:904
82:678 83:550 84:536 85:1198 86:417 87:907
88:346 89:1640 90:297 91:4674 92:520 93:1432
94:1483 95:1171 96:380 97:316 98:824 99:37
100:7 101:172 103:928 106:66 107:180 108:222
109:1260 110:763 111:905 112:447 113:594 114:636
115:778 116:914 117:722 118:919 119:1212 120:336
121:715 122:1667 123:1110 124:1372 125:1265 128:563
129:186 130:258 131:596 132:171 133:21 134:243
135:63 136:212 137:177 138:352 139:157 140:494
141:244 142:387 143:400 144:513 145:66 146:485
147:253 148:798 149:296 150:157 151:176 152:462
153:171 154:7 155:445 156:215 157:381 158:176
159:523 160:342 161:248 162:343 163:189 164:571
165:404 166:562 167:464 168:817 169:148 170:844
171:125 172:4 173:1744 174:573 175:444 176:457
177:624 178:1309 180:1232 181:74 182:779 183:284
184:447 185:1 186:2157 187:1029 188:1189 189:1783
190:5534 192:6031 193:5631 194:4645 195:3633 196:1297
197:123 198:3633 199:4500 200:5815 201:1901 202:8493
203:8619 204:4348 205:2478 206:2774 207:2798 208:4075
209:3611 210:2783 211:1482 212:2040 213:1912 214:878
215:109 216:5089 217:1528 218:543 219:337 220:1238
221:556 222:333 223:330

End of report
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