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.

Wednesday, May 23, 2012

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Thu 24 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: 413054
Prefixes after maximum aggregation: 174551
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 198576
Total ASes present in the Internet Routing Table: 40912
Prefixes per ASN: 10.10
Origin-only ASes present in the Internet Routing Table: 33200
Origin ASes announcing only one prefix: 15639
Transit ASes present in the Internet Routing Table: 5407
Transit-only ASes present in the Internet Routing Table: 126
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: 6222
Unregistered ASNs in the Routing Table: 141
Number of 32-bit ASNs allocated by the RIRs: 2733
Number of 32-bit ASNs visible in the Routing Table: 2305
Prefixes from 32-bit ASNs in the Routing Table: 5778
Special use prefixes present in the Routing Table: 87
Prefixes being announced from unallocated address space: 111
Number of addresses announced to Internet: 2544956213
Equivalent to 151 /8s, 176 /16s and 243 /24s
Percentage of available address space announced: 68.7
Percentage of allocated address space announced: 68.7
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.6
Total number of prefixes smaller than registry allocations: 175423

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

Prefixes being announced by APNIC Region ASes: 97666
Total APNIC prefixes after maximum aggregation: 31161
APNIC Deaggregation factor: 3.13
Prefixes being announced from the APNIC address blocks: 94188
Unique aggregates announced from the APNIC address blocks: 39808
APNIC Region origin ASes present in the Internet Routing Table: 4667
APNIC Prefixes per ASN: 20.18
APNIC Region origin ASes announcing only one prefix: 1251
APNIC Region transit ASes present in the Internet Routing Table: 728
Average APNIC Region AS path length visible: 4.2
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 198
Number of APNIC addresses announced to Internet: 644380928
Equivalent to 38 /8s, 104 /16s and 121 /24s
Percentage of available APNIC address space announced: 81.7

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: 153387
Total ARIN prefixes after maximum aggregation: 78691
ARIN Deaggregation factor: 1.95
Prefixes being announced from the ARIN address blocks: 124138
Unique aggregates announced from the ARIN address blocks: 50650
ARIN Region origin ASes present in the Internet Routing Table: 15094
ARIN Prefixes per ASN: 8.22
ARIN Region origin ASes announcing only one prefix: 5735
ARIN Region transit ASes present in the Internet Routing Table: 1552
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: 810127872
Equivalent to 48 /8s, 73 /16s and 146 /24s
Percentage of available ARIN address space announced: 64.6

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: 105264
Total RIPE prefixes after maximum aggregation: 54221
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 96274
Unique aggregates announced from the RIPE address blocks: 58520
RIPE Region origin ASes present in the Internet Routing Table: 16554
RIPE Prefixes per ASN: 5.82
RIPE Region origin ASes announcing only one prefix: 8042
RIPE Region transit ASes present in the Internet Routing Table: 2627
Average RIPE Region AS path length visible: 4.4
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1551
Number of RIPE addresses announced to Internet: 512031372
Equivalent to 30 /8s, 132 /16s and 250 /24s
Percentage of available RIPE address space announced: 82.5

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: 41750
Total LACNIC prefixes after maximum aggregation: 8250
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 41649
Unique aggregates announced from the LACNIC address blocks: 20310
LACNIC Region origin ASes present in the Internet Routing Table: 1592
LACNIC Prefixes per ASN: 26.16
LACNIC Region origin ASes announcing only one prefix: 441
LACNIC Region transit ASes present in the Internet Routing Table: 297
Average LACNIC Region AS path length visible: 4.3
Max LACNIC Region AS path length visible: 22
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 534
Number of LACNIC addresses announced to Internet: 100089864
Equivalent to 5 /8s, 247 /16s and 64 /24s
Percentage of available LACNIC address space announced: 66.3

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: 8990
Total AfriNIC prefixes after maximum aggregation: 2164
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 7013
Unique aggregates announced from the AfriNIC address blocks: 2231
AfriNIC Region origin ASes present in the Internet Routing Table: 538
AfriNIC Prefixes per ASN: 13.04
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 123
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: 31809792
Equivalent to 1 /8s, 229 /16s and 97 /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 1937 11105 694 Korea Telecom (KIX)
17974 1868 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1659 301 87 TPG Internet Pty Ltd
4755 1576 385 156 Videsh Sanchar Nigam Ltd. Aut
9829 1281 1069 30 BSNL National Internet Backbo
7552 1178 1062 11 Vietel Corporation
9583 1149 85 494 Sify Limited
24560 1027 385 167 Bharti Airtel Ltd.
4808 976 1960 288 CNCGROUP IP network: China169
9498 963 291 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 3425 3807 195 bellsouth.net, inc.
7029 3414 1016 171 Windstream Communications Inc
18566 2092 382 179 Covad Communications
1785 1910 680 130 AppliedTheory Corporation
20115 1640 1566 619 Charter Communications
4323 1602 1060 383 Time Warner Telecom
22773 1591 2911 115 Cox Communications, Inc.
30036 1423 261 761 Mediacom Communications Corp
7018 1254 14150 823 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 1594 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
15557 1160 2247 53 LDCOM NETWORKS
286 1059 853 197 KPNQwest Backbone AS
34984 688 188 172 Tellcom Iletisim Hizmetleri
31148 683 37 9 FreeNet ISP
12479 672 669 68 Uni2 Autonomous System
6830 657 2216 428 UPC Distribution Services
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 1825 1130 59 Types of queries are: POCs, o
6503 1545 418 67 AVANTEL, S.A.
8151 1514 2981 321 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 643 91 73 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 1308 958 13 TEDATA
24863 841 274 33 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 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
16637 157 666 86 Johnnic e-Ventures
29571 157 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 3425 3807 195 bellsouth.net, inc.
7029 3414 1016 171 Windstream Communications Inc
18566 2092 382 179 Covad Communications
4766 1937 11105 694 Korea Telecom (KIX)
1785 1910 680 130 AppliedTheory Corporation
17974 1868 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1854 332 179 TVCABLE BOGOTA
28573 1825 1130 59 Types of queries are: POCs, o
7545 1659 301 87 TPG Internet Pty Ltd
20115 1640 1566 619 Charter Communications

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 1910 1780 AppliedTheory Corporation
28573 1825 1766 Types of queries are: POCs, o
10620 1854 1675 TVCABLE BOGOTA
8402 1594 1578 Corbina telecom
7545 1659 1572 TPG Internet Pty Ltd
6503 1545 1478 AVANTEL, S.A.
22773 1591 1476 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
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
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
10.29.245.1/32 286 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
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
27.54.144.0/24 45774 Chandra Net Pvt. Limited, Ind
27.54.151.0/24 45774 Chandra Net Pvt. Limited, Ind

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 /11:82 /12:235
/13:460 /14:838 /15:1534 /16:12403 /17:6517 /18:10965
/19:21213 /20:30298 /21:30576 /22:41193 /23:38657 /24:216411
/25:71 /26:76 /27:105 /28:267 /29:112 /30:500
/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 1572 1594 Corbina telecom
30036 1367 1423 Mediacom Communications Corp
6503 1300 1545 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1109 1308 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)
----------------------------------------------

1:541 2:531 4:18 6:3 8:407 12:1997
13:1 14:615 15:12 16:3 17:5 20:23
23:165 24:1770 27:1293 31:976 32:119 33:2
34:2 36:8 37:428 38:800 39:4 40:120
41:3101 42:136 44:3 46:1432 47:3 49:419
50:551 52:13 54:10 55:11 56:3 57:38
58:964 59:488 60:253 61:1220 62:1041 63:2052
64:4203 65:2254 66:4505 67:2059 68:1347 69:3294
70:951 71:485 72:1859 73:1 74:2665 75:507
76:329 77:944 78:986 79:506 80:1257 81:916
82:691 83:549 84:603 85:1216 86:774 87:931
88:353 89:1682 90:291 91:4801 92:530 93:1632
94:1514 95:896 96:370 97:316 98:870 99:37
100:7 101:189 103:1049 106:101 107:191 108:286
109:1695 110:770 111:920 112:454 113:605 114:635
115:809 116:935 117:723 118:922 119:1232 120:357
121:715 122:1674 123:1111 124:1390 125:1241 128:563
129:197 130:255 131:624 132:179 133:22 134:248
135:62 136:215 137:176 138:356 139:195 140:494
141:245 142:411 143:432 144:522 145:70 146:501
147:292 148:808 149:307 150:158 151:180 152:466
153:172 154:12 155:417 156:217 157:378 158:176
159:546 160:338 161:260 162:348 163:191 164:584
165:420 166:573 167:467 168:823 169:129 170:863
171:127 172:2 173:1780 174:580 175:444 176:651
177:718 178:1358 180:1238 181:82 182:967 183:292
184:481 185:1 186:2281 187:1073 188:1232 189:1783
190:5598 192:6046 193:5583 194:4698 195:3689 196:1281
197:134 198:3676 199:4600 200:5848 201:1943 202:8567
203:8648 204:4343 205:2513 206:2770 207:2808 208:4075
209:3656 210:2757 211:1492 212:2055 213:1947 214:853
215:103 216:5142 217:1547 218:546 219:333 220:1239
221:558 222:328 223:337

End of report
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