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.

Sunday, April 29, 2012

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Mon 30 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: 413915
Prefixes after maximum aggregation: 174518
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 198327
Total ASes present in the Internet Routing Table: 40897
Prefixes per ASN: 10.12
Origin-only ASes present in the Internet Routing Table: 33214
Origin ASes announcing only one prefix: 15647
Transit ASes present in the Internet Routing Table: 5389
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: 29
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 6228
Unregistered ASNs in the Routing Table: 172
Number of 32-bit ASNs allocated by the RIRs: 2651
Number of 32-bit ASNs visible in the Routing Table: 2294
Prefixes from 32-bit ASNs in the Routing Table: 5723
Special use prefixes present in the Routing Table: 86
Prefixes being announced from unallocated address space: 107
Number of addresses announced to Internet: 2541404754
Equivalent to 151 /8s, 122 /16s and 194 /24s
Percentage of available address space announced: 68.6
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: 92.5
Total number of prefixes smaller than registry allocations: 176201

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

Prefixes being announced by APNIC Region ASes: 97878
Total APNIC prefixes after maximum aggregation: 31189
APNIC Deaggregation factor: 3.14
Prefixes being announced from the APNIC address blocks: 94443
Unique aggregates announced from the APNIC address blocks: 39831
APNIC Region origin ASes present in the Internet Routing Table: 4676
APNIC Prefixes per ASN: 20.20
APNIC Region origin ASes announcing only one prefix: 1260
APNIC Region transit ASes present in the Internet Routing Table: 732
Average APNIC Region AS path length visible: 4.2
Max APNIC Region AS path length visible: 21
Number of APNIC region 32-bit ASNs visible in the Routing Table: 191
Number of APNIC addresses announced to Internet: 644333056
Equivalent to 38 /8s, 103 /16s and 190 /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: 154329
Total ARIN prefixes after maximum aggregation: 78673
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 125093
Unique aggregates announced from the ARIN address blocks: 50454
ARIN Region origin ASes present in the Internet Routing Table: 15075
ARIN Prefixes per ASN: 8.30
ARIN Region origin ASes announcing only one prefix: 5723
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: 807383296
Equivalent to 48 /8s, 31 /16s and 177 /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: 105157
Total RIPE prefixes after maximum aggregation: 54162
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 96236
Unique aggregates announced from the RIPE address blocks: 58507
RIPE Region origin ASes present in the Internet Routing Table: 16552
RIPE Prefixes per ASN: 5.81
RIPE Region origin ASes announcing only one prefix: 8054
RIPE Region transit ASes present in the Internet Routing Table: 2600
Average RIPE Region AS path length visible: 3.8
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1542
Number of RIPE addresses announced to Internet: 511580812
Equivalent to 30 /8s, 126 /16s and 26 /24s
Percentage of available RIPE address space announced: 82.4

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: 41590
Total LACNIC prefixes after maximum aggregation: 8274
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 41445
Unique aggregates announced from the LACNIC address blocks: 20258
LACNIC Region origin ASes present in the Internet Routing Table: 1592
LACNIC Prefixes per ASN: 26.03
LACNIC Region origin ASes announcing only one prefix: 439
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: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 539
Number of LACNIC addresses announced to Internet: 99786248
Equivalent to 5 /8s, 242 /16s and 158 /24s
Percentage of available LACNIC address space announced: 66.1

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: 8962
Total AfriNIC prefixes after maximum aggregation: 2151
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 7028
Unique aggregates announced from the AfriNIC address blocks: 2224
AfriNIC Region origin ASes present in the Internet Routing Table: 538
AfriNIC Prefixes per ASN: 13.06
AfriNIC Region origin ASes announcing only one prefix: 171
AfriNIC Region transit ASes present in the Internet Routing Table: 120
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: 31793408
Equivalent to 1 /8s, 229 /16s and 33 /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 1916 11104 692 Korea Telecom (KIX)
17974 1824 509 71 PT TELEKOMUNIKASI INDONESIA
7545 1659 301 89 TPG Internet Pty Ltd
4755 1593 387 164 Videsh Sanchar Nigam Ltd. Aut
9829 1261 1069 30 BSNL National Internet Backbo
7552 1169 1062 11 Vietel Corporation
9583 1147 85 492 Sify Limited
4808 1049 2026 309 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd.
9498 950 291 62 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 194 bellsouth.net, inc.
7029 3408 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications
1785 1909 681 131 AppliedTheory Corporation
20115 1640 1566 619 Charter Communications
4323 1599 1060 383 Time Warner Telecom
22773 1581 2910 114 Cox Communications, Inc.
30036 1420 261 768 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 1565 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 682 37 9 FreeNet ISP
34984 681 188 173 Tellcom Iletisim Hizmetleri
6830 657 2216 428 UPC Distribution Services
12479 650 668 66 Uni2 Autonomous System
20940 638 206 502 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 1851 332 177 TVCABLE BOGOTA
28573 1812 1114 62 Types of queries are: POCs, o
6503 1540 418 67 AVANTEL, S.A.
8151 1528 2982 326 Uninet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 904 761 33 Types of queries are: POCs, o
27947 686 74 98 Telconet S.A
11172 640 107 74 Alestra
22047 582 326 15 Types of queries are: POCs, o
3816 576 242 100 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 1312 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 194 bellsouth.net, inc.
7029 3408 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications
4766 1916 11104 692 Korea Telecom (KIX)
1785 1909 681 131 AppliedTheory Corporation
10620 1851 332 177 TVCABLE BOGOTA
17974 1824 509 71 PT TELEKOMUNIKASI INDONESIA
28573 1812 1114 62 Types of queries are: POCs, o
7545 1659 301 89 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 3408 3238 Windstream Communications Inc
18566 2092 1913 Covad Communications
1785 1909 1778 AppliedTheory Corporation
17974 1824 1753 PT TELEKOMUNIKASI INDONESIA
28573 1812 1750 Types of queries are: POCs, o
10620 1851 1674 TVCABLE BOGOTA
7545 1659 1570 TPG Internet Pty Ltd
8402 1565 1549 Corbina telecom
6503 1540 1473 AVANTEL, S.A.
22773 1581 1467 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 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
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
10.29.245.19/32 286 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
27.112.114.0/24 23884 Proimage Engineering and Comm
41.222.79.0/24 36938 >>UNKNOWN<<

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
/13:461 /14:839 /15:1529 /16:12402 /17:6522 /18:10957
/19:21196 /20:30259 /21:30580 /22:41101 /23:38745 /24:217335
/25:71 /26:76 /27:105 /28:271 /29:112 /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 1712 1851 TVCABLE BOGOTA
8402 1543 1565 Corbina telecom
30036 1364 1420 Mediacom Communications Corp
6503 1297 1540 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1111 1312 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)
----------------------------------------------

1:543 2:532 4:18 6:3 8:407 12:2016
13:1 14:612 15:12 16:3 17:7 20:23
23:169 24:1770 27:1275 31:980 32:119 33:2
34:2 36:8 37:426 38:802 39:4 40:120
41:3136 42:136 44:3 46:1499 47:3 49:409
50:542 52:13 54:8 55:11 56:3 57:38
58:977 59:519 60:253 61:1289 62:1035 63:2008
64:4310 65:2258 66:4540 67:2165 68:1391 69:3330
70:1269 71:484 72:1877 73:1 74:2667 75:507
76:356 77:949 78:984 79:505 80:1253 81:915
82:687 83:552 84:604 85:1217 86:774 87:941
88:360 89:1597 90:291 91:4801 92:529 93:1650
94:1520 95:929 96:361 97:315 98:933 99:37
100:7 101:185 103:1038 106:102 107:191 108:272
109:1675 110:767 111:923 112:455 113:607 114:649
115:892 116:935 117:723 118:924 119:1231 120:357
121:831 122:1678 123:1108 124:1386 125:1246 128:565
129:198 130:260 131:627 132:180 133:22 134:248
135:62 136:214 137:176 138:355 139:176 140:492
141:243 142:408 143:401 144:525 145:74 146:502
147:289 148:803 149:306 150:159 151:180 152:464
153:172 154:13 155:417 156:215 157:381 158:180
159:542 160:338 161:262 162:348 163:191 164:583
165:421 166:573 167:468 168:821 169:129 170:862
171:127 172:2 173:1776 174:601 175:449 176:684
177:661 178:1362 180:1225 181:79 182:832 183:289
184:464 185:1 186:2261 187:1063 188:1241 189:1798
190:5573 192:6051 193:5580 194:4686 195:3684 196:1286
197:132 198:3679 199:4548 200:5829 201:1937 202:8561
203:8652 204:4333 205:2510 206:2767 207:2833 208:4117
209:3714 210:2774 211:1493 212:2083 213:1942 214:849
215:104 216:5176 217:1541 218:549 219:353 220:1237
221:559 222:330 223:336

End of report
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