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.

Friday, April 27, 2012

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

* BGP Routing Table Analysis Reports *
Routing Table Report 00:00 GMT Sat 28 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: 413339
Prefixes after maximum aggregation: 174392
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 198321
Total ASes present in the Internet Routing Table: 40875
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33203
Origin ASes announcing only one prefix: 15635
Transit ASes present in the Internet Routing Table: 5382
Transit-only ASes present in the Internet Routing Table: 130
Average AS path length visible in the Internet Routing Table: 4.0
Max AS path length visible: 30
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 6220
Unregistered ASNs in the Routing Table: 175
Number of 32-bit ASNs allocated by the RIRs: 2635
Number of 32-bit ASNs visible in the Routing Table: 2290
Prefixes from 32-bit ASNs in the Routing Table: 5715
Special use prefixes present in the Routing Table: 86
Prefixes being announced from unallocated address space: 111
Number of addresses announced to Internet: 2541260626
Equivalent to 151 /8s, 120 /16s and 143 /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: 175984

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

Prefixes being announced by APNIC Region ASes: 97693
Total APNIC prefixes after maximum aggregation: 31180
APNIC Deaggregation factor: 3.13
Prefixes being announced from the APNIC address blocks: 94260
Unique aggregates announced from the APNIC address blocks: 39881
APNIC Region origin ASes present in the Internet Routing Table: 4675
APNIC Prefixes per ASN: 20.16
APNIC Region origin ASes announcing only one prefix: 1258
APNIC Region transit ASes present in the Internet Routing Table: 737
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: 644340992
Equivalent to 38 /8s, 103 /16s and 221 /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: 154144
Total ARIN prefixes after maximum aggregation: 78616
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 124937
Unique aggregates announced from the ARIN address blocks: 50425
ARIN Region origin ASes present in the Internet Routing Table: 15070
ARIN Prefixes per ASN: 8.29
ARIN Region origin ASes announcing only one prefix: 5722
ARIN Region transit ASes present in the Internet Routing Table: 1563
Average ARIN Region AS path length visible: 3.7
Max ARIN Region AS path length visible: 30
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 807373824
Equivalent to 48 /8s, 31 /16s and 140 /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: 105088
Total RIPE prefixes after maximum aggregation: 54110
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 96189
Unique aggregates announced from the RIPE address blocks: 58456
RIPE Region origin ASes present in the Internet Routing Table: 16542
RIPE Prefixes per ASN: 5.81
RIPE Region origin ASes announcing only one prefix: 8045
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: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1541
Number of RIPE addresses announced to Internet: 511134092
Equivalent to 30 /8s, 119 /16s and 73 /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: 41495
Total LACNIC prefixes after maximum aggregation: 8266
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 41334
Unique aggregates announced from the LACNIC address blocks: 20274
LACNIC Region origin ASes present in the Internet Routing Table: 1591
LACNIC Prefixes per ASN: 25.98
LACNIC Region origin ASes announcing only one prefix: 440
LACNIC Region transit ASes present in the Internet Routing Table: 297
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 22
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 535
Number of LACNIC addresses announced to Internet: 99776008
Equivalent to 5 /8s, 242 /16s and 118 /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: 8928
Total AfriNIC prefixes after maximum aggregation: 2152
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 6992
Unique aggregates announced from the AfriNIC address blocks: 2226
AfriNIC Region origin ASes present in the Internet Routing Table: 538
AfriNIC Prefixes per ASN: 13.00
AfriNIC Region origin ASes announcing only one prefix: 170
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: 31794176
Equivalent to 1 /8s, 229 /16s and 36 /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 1146 85 491 Sify Limited
4808 1049 2026 309 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd.
9498 955 291 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 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 1601 1060 384 Time Warner Telecom
22773 1580 2910 114 Cox Communications, Inc.
30036 1419 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 1633 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
15557 1160 2247 53 LDCOM NETWORKS
286 1043 853 197 KPNQwest Backbone AS
31148 681 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 639 206 502 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 1832 329 171 TVCABLE BOGOTA
28573 1806 1114 62 Types of queries are: POCs, o
6503 1541 418 67 AVANTEL, S.A.
8151 1531 2982 327 Uninet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 903 761 33 Types of queries are: POCs, o
27947 686 74 98 Telconet S.A
11172 641 107 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 1304 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 1832 329 171 TVCABLE BOGOTA
17974 1824 509 71 PT TELEKOMUNIKASI INDONESIA
28573 1806 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 1806 1744 Types of queries are: POCs, o
10620 1832 1661 TVCABLE BOGOTA
8402 1633 1617 Corbina telecom
7545 1659 1570 TPG Internet Pty Ltd
6503 1541 1474 AVANTEL, S.A.
22773 1580 1466 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
5.3.0.0/16 41733 JSC "Z-Telecom"
5.8.184.0/21 29286 Skylogic Italia Autonomous Sy
5.16.0.0/14 41733 JSC "Z-Telecom"
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

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 /14:839 /15:1529 /16:12402 /17:6514 /18:10942
/19:21182 /20:30199 /21:30536 /22:41053 /23:38662 /24:217040
/25:71 /26:77 /27:106 /28:272 /29:112 /30:488
/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 1611 1633 Corbina telecom
30036 1363 1419 Mediacom Communications Corp
6503 1298 1541 AVANTEL, S.A.
11492 1149 1186 Cable One
15557 1107 1160 LDCOM NETWORKS
8452 1104 1304 TEDATA

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

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

1:543 2:523 4:18 6:3 8:407 12:2016
13:1 14:614 15:12 16:3 17:7 20:23
23:168 24:1769 27:1274 31:980 32:119 33:2
34:2 36:8 37:423 38:802 39:4 40:120
41:3108 42:136 44:3 46:1498 47:3 49:409
50:540 52:13 54:8 55:11 56:3 57:38
58:969 59:519 60:253 61:1289 62:1035 63:2007
64:4297 65:2256 66:4508 67:2163 68:1391 69:3328
70:1269 71:484 72:1876 73:1 74:2655 75:507
76:356 77:944 78:1014 79:505 80:1253 81:912
82:689 83:552 84:604 85:1215 86:774 87:941
88:359 89:1641 90:291 91:4797 92:528 93:1650
94:1519 95:926 96:361 97:315 98:907 99:37
100:7 101:185 103:1039 106:102 107:191 108:270
109:1671 110:756 111:923 112:455 113:602 114:648
115:883 116:935 117:720 118:925 119:1223 120:357
121:831 122:1677 123:1109 124:1369 125:1245 128:564
129:199 130:259 131:627 132:180 133:22 134:245
135:62 136:214 137:177 138:355 139:175 140:492
141:243 142:408 143:401 144:526 145:74 146:502
147:289 148:804 149:306 150:159 151:181 152:464
153:172 154:13 155:417 156:215 157:382 158:180
159:540 160:338 161:262 162:348 163:191 164:581
165:421 166:573 167:468 168:821 169:129 170:860
171:127 172:2 173:1775 174:583 175:449 176:687
177:659 178:1352 180:1221 181:79 182:831 183:289
184:463 185:1 186:2261 187:1059 188:1239 189:1792
190:5565 192:6046 193:5565 194:4685 195:3681 196:1286
197:131 198:3677 199:4548 200:5828 201:1937 202:8549
203:8639 204:4332 205:2505 206:2767 207:2832 208:4117
209:3714 210:2770 211:1490 212:2081 213:1942 214:846
215:104 216:5172 217:1541 218:548 219:353 220:1237
221:559 222:330 223:324

End of report
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