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, April 26, 2012

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Fri 27 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: 413670
Prefixes after maximum aggregation: 174476
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 198172
Total ASes present in the Internet Routing Table: 40876
Prefixes per ASN: 10.12
Origin-only ASes present in the Internet Routing Table: 33209
Origin ASes announcing only one prefix: 15641
Transit ASes present in the Internet Routing Table: 5382
Transit-only ASes present in the Internet Routing Table: 131
Average AS path length visible in the Internet Routing Table: 4.0
Max AS path length visible: 24
Max AS path prepend of ASN (36992) 22
Prefixes from unregistered ASNs in the Routing Table: 6212
Unregistered ASNs in the Routing Table: 175
Number of 32-bit ASNs allocated by the RIRs: 2631
Number of 32-bit ASNs visible in the Routing Table: 2285
Prefixes from 32-bit ASNs in the Routing Table: 5707
Special use prefixes present in the Routing Table: 86
Prefixes being announced from unallocated address space: 121
Number of addresses announced to Internet: 2540506450
Equivalent to 151 /8s, 109 /16s and 13 /24s
Percentage of available address space announced: 68.5
Percentage of allocated address space announced: 68.6
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.4
Total number of prefixes smaller than registry allocations: 176189

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

Prefixes being announced by APNIC Region ASes: 97778
Total APNIC prefixes after maximum aggregation: 31194
APNIC Deaggregation factor: 3.13
Prefixes being announced from the APNIC address blocks: 94342
Unique aggregates announced from the APNIC address blocks: 39866
APNIC Region origin ASes present in the Internet Routing Table: 4676
APNIC Prefixes per ASN: 20.18
APNIC Region origin ASes announcing only one prefix: 1258
APNIC Region transit ASes present in the Internet Routing Table: 735
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: 192
Number of APNIC addresses announced to Internet: 644222720
Equivalent to 38 /8s, 102 /16s and 15 /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: 154107
Total ARIN prefixes after maximum aggregation: 78732
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 124924
Unique aggregates announced from the ARIN address blocks: 50370
ARIN Region origin ASes present in the Internet Routing Table: 15073
ARIN Prefixes per ASN: 8.29
ARIN Region origin ASes announcing only one prefix: 5725
ARIN Region transit ASes present in the Internet Routing Table: 1565
Average ARIN Region AS path length visible: 3.8
Max ARIN Region AS path length visible: 20
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 807340544
Equivalent to 48 /8s, 31 /16s and 10 /24s
Percentage of available ARIN address space announced: 64.4

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: 105062
Total RIPE prefixes after maximum aggregation: 54072
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 96157
Unique aggregates announced from the RIPE address blocks: 58423
RIPE Region origin ASes present in the Internet Routing Table: 16540
RIPE Prefixes per ASN: 5.81
RIPE Region origin ASes announcing only one prefix: 8047
RIPE Region transit ASes present in the Internet Routing Table: 2589
Average RIPE Region AS path length visible: 3.7
Max RIPE Region AS path length visible: 24
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1535
Number of RIPE addresses announced to Internet: 511060364
Equivalent to 30 /8s, 118 /16s and 41 /24s
Percentage of available RIPE address space announced: 82.3

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: 41676
Total LACNIC prefixes after maximum aggregation: 8261
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 41518
Unique aggregates announced from the LACNIC address blocks: 20266
LACNIC Region origin ASes present in the Internet Routing Table: 1592
LACNIC Prefixes per ASN: 26.08
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 295
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 536
Number of LACNIC addresses announced to Internet: 99503112
Equivalent to 5 /8s, 238 /16s and 76 /24s
Percentage of available LACNIC address space announced: 65.9

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: 9065
Total AfriNIC prefixes after maximum aggregation: 2149
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 7119
Unique aggregates announced from the AfriNIC address blocks: 2199
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.18
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 119
Average AfriNIC Region AS path length visible: 4.3
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: 31808768
Equivalent to 1 /8s, 229 /16s and 93 /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 1929 11104 692 Korea Telecom (KIX)
17974 1824 509 71 PT TELEKOMUNIKASI INDONESIA
7545 1672 301 88 TPG Internet Pty Ltd
4755 1591 387 166 Videsh Sanchar Nigam Ltd. Aut
9829 1261 1069 30 BSNL National Internet Backbo
7552 1169 1062 11 Vietel Corporation
9583 1146 85 491 Sify Limited
4808 1050 2026 309 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd.
9498 952 291 64 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 3424 3807 199 bellsouth.net, inc.
7029 3408 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications
1785 1913 737 135 AppliedTheory Corporation
20115 1640 1566 619 Charter Communications
4323 1606 1060 384 Time Warner Telecom
22773 1582 2910 114 Cox Communications, Inc.
30036 1418 260 767 Mediacom Communications Corp
7018 1253 13886 821 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 1644 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
15557 1160 2247 53 LDCOM NETWORKS
286 1054 853 197 KPNQwest Backbone AS
31148 681 37 9 FreeNet ISP
34984 681 188 174 Tellcom Iletisim Hizmetleri
6830 657 2216 428 UPC Distribution Services
12479 646 666 62 Uni2 Autonomous System
20940 632 206 500 Akamai Technologies European
8551 558 360 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 1832 329 171 TVCABLE BOGOTA
28573 1795 1111 61 Types of queries are: POCs, o
6503 1541 418 67 AVANTEL, S.A.
8151 1534 2982 328 Uninet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 902 697 32 Types of queries are: POCs, o
27947 685 74 98 Telconet S.A
11172 641 107 74 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 1305 958 13 TEDATA
24863 838 274 33 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 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 164 666 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 3424 3807 199 bellsouth.net, inc.
7029 3408 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications
4766 1929 11104 692 Korea Telecom (KIX)
1785 1913 737 135 AppliedTheory Corporation
10620 1832 329 171 TVCABLE BOGOTA
17974 1824 509 71 PT TELEKOMUNIKASI INDONESIA
28573 1795 1111 61 Types of queries are: POCs, o
7545 1672 301 88 TPG Internet Pty Ltd
8402 1644 544 16 Corbina telecom

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 3408 3238 Windstream Communications Inc
18566 2092 1913 Covad Communications
1785 1913 1778 AppliedTheory Corporation
17974 1824 1753 PT TELEKOMUNIKASI INDONESIA
28573 1795 1734 Types of queries are: POCs, o
10620 1832 1661 TVCABLE BOGOTA
8402 1644 1628 Corbina telecom
7545 1672 1584 TPG Internet Pty Ltd
6503 1541 1474 AVANTEL, S.A.
22773 1582 1468 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 5.1.56.0/21 2819 KPNQwest Czechia AS
23456 UNALLOCATED 8.10.2.0/24 3257 Tiscali Intl Network
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
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,

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
5.1.56.0/21 23456 >>UNKNOWN<<
5.9.0.0/16 24940 Hetzner Online AG RZ-Nuernber
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

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 /11:81 /12:235
/13:460 /14:837 /15:1528 /16:12401 /17:6519 /18:10943
/19:21199 /20:30200 /21:30525 /22:41114 /23:38681 /24:217272
/25:70 /26:76 /27:106 /28:274 /29:111 /30:499
/31:19 /32:461

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

ASN No of nets Total ann. Description
7029 3047 3408 Windstream Communications Inc
6389 2142 3424 bellsouth.net, inc.
18566 2041 2092 Covad Communications
10620 1709 1832 TVCABLE BOGOTA
8402 1622 1644 Corbina telecom
30036 1362 1418 Mediacom Communications Corp
6503 1298 1541 AVANTEL, S.A.
11492 1149 1186 Cable One
15557 1107 1160 LDCOM NETWORKS
8452 1105 1305 TEDATA

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

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

1:543 2:666 4:18 6:3 8:407 12:2017
13:1 14:613 15:12 16:3 17:7 20:23
23:168 24:1769 27:1274 31:977 32:119 33:2
34:2 36:8 37:422 38:803 39:4 40:120
41:3184 42:135 44:3 46:1498 47:3 49:409
50:539 52:13 54:8 55:10 56:3 57:39
58:971 59:520 60:253 61:1288 62:1038 63:2010
64:4298 65:2256 66:4510 67:2161 68:1391 69:3328
70:1270 71:484 72:1876 73:1 74:2653 75:507
76:357 77:954 78:1013 79:505 80:1253 81:914
82:682 83:553 84:603 85:1214 86:774 87:941
88:355 89:1659 90:291 91:4792 92:524 93:1507
94:1518 95:1177 96:361 97:315 98:915 99:37
100:7 101:176 103:1035 106:102 107:191 108:245
109:1668 110:771 111:921 112:458 113:600 114:657
115:878 116:932 117:720 118:926 119:1231 120:357
121:830 122:1680 123:1106 124:1377 125:1239 128:549
129:197 130:259 131:627 132:180 133:22 134:245
135:62 136:213 137:177 138:355 139:160 140:492
141:244 142:405 143:402 144:522 145:74 146:502
147:288 148:801 149:306 150:159 151:176 152:465
153:171 154:13 155:417 156:215 157:382 158:178
159:540 160:337 161:266 162:348 163:191 164:580
165:422 166:573 167:468 168:822 169:129 170:861
171:127 172:2 173:1775 174:583 175:448 176:443
177:656 178:1350 180:1221 181:82 182:829 183:289
184:460 185:1 186:2255 187:1062 188:1222 189:1792
190:5575 192:6044 193:5562 194:4684 195:3676 196:1302
197:134 198:3680 199:4547 200:5827 201:2148 202:8540
203:8630 204:4334 205:2503 206:2768 207:2833 208:4118
209:3713 210:2774 211:1490 212:2072 213:1941 214:849
215:104 216:5169 217:1541 218:547 219:353 220:1237
221:559 222:330 223:335

End of report
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