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, May 28, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Tue 29 May, 2012

Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/london/

Analysis Summary
----------------

BGP routing table entries examined: 404671
Prefixes after maximum aggregation: 172200
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 200218
Total ASes present in the Internet Routing Table: 38589
Prefixes per ASN: 10.49
Origin-only ASes present in the Internet Routing Table: 33289
Origin ASes announcing only one prefix: 15696
Transit ASes present in the Internet Routing Table: 5300
Transit-only ASes present in the Internet Routing Table: 112
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 26
Max AS path prepend of ASN (51742) 24
Prefixes from unregistered ASNs in the Routing Table: 1165
Unregistered ASNs in the Routing Table: 228
Number of 32-bit ASNs allocated by the RIRs: 2762
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6065
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 109
Number of addresses announced to Internet: 2573942016
Equivalent to 153 /8s, 107 /16s and 61 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.5
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 171038

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

Prefixes being announced by APNIC Region ASes: 94729
Total APNIC prefixes after maximum aggregation: 30965
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 92218
Unique aggregates announced from the APNIC address blocks: 40125
APNIC Region origin ASes present in the Internet Routing Table: 4653
APNIC Prefixes per ASN: 19.82
APNIC Region origin ASes announcing only one prefix: 1266
APNIC Region transit ASes present in the Internet Routing Table: 714
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 645269248
Equivalent to 38 /8s, 118 /16s and 7 /24s
Percentage of available APNIC address space announced: 81.8

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: 150112
Total ARIN prefixes after maximum aggregation: 76367
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120847
Unique aggregates announced from the ARIN address blocks: 51083
ARIN Region origin ASes present in the Internet Routing Table: 15076
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5744
ARIN Region transit ASes present in the Internet Routing Table: 1519
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 16
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 812294144
Equivalent to 48 /8s, 106 /16s and 160 /24s
Percentage of available ARIN address space announced: 64.8

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: 102716
Total RIPE prefixes after maximum aggregation: 54460
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 94827
Unique aggregates announced from the RIPE address blocks: 59183
RIPE Region origin ASes present in the Internet Routing Table: 16587
RIPE Prefixes per ASN: 5.72
RIPE Region origin ASes announcing only one prefix: 8075
RIPE Region transit ASes present in the Internet Routing Table: 2588
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 26
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 514487552
Equivalent to 30 /8s, 170 /16s and 117 /24s
Percentage of available RIPE address space announced: 82.9

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: 40928
Total LACNIC prefixes after maximum aggregation: 8160
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 41233
Unique aggregates announced from the LACNIC address blocks: 20502
LACNIC Region origin ASes present in the Internet Routing Table: 1585
LACNIC Prefixes per ASN: 26.01
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 296
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 101178880
Equivalent to 6 /8s, 7 /16s and 222 /24s
Percentage of available LACNIC address space announced: 67.0

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: 9286
Total AfriNIC prefixes after maximum aggregation: 2184
AfriNIC Deaggregation factor: 4.25
Prefixes being announced from the AfriNIC address blocks: 7355
Unique aggregates announced from the AfriNIC address blocks: 2189
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.62
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 121
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 0
Number of AfriNIC addresses announced to Internet: 31734528
Equivalent to 1 /8s, 228 /16s and 59 /24s
Percentage of available AfriNIC address space announced: 47.3

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 1979 11104 729 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1666 301 87 TPG Internet Pty Ltd
4755 1553 384 153 TATA Communications formerly
9829 1298 1085 28 National Internet Backbone
9583 1161 87 499 Sify Limited
7552 1127 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 63 BHARTI Airtel Ltd.
4808 951 1938 283 CNCGROUP IP network China169

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 3412 3807 193 BellSouth.net Inc.
7029 3374 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
1785 1908 680 130 PaeTec Communications, Inc.
20115 1639 1566 616 Charter Communications
22773 1608 2911 121 Cox Communications Inc.
4323 1562 1056 379 tw telecom holdings, inc.
30036 1407 261 755 Mediacom Communications Corp
7018 1230 10064 828 AT&T Services, Inc.
7011 1188 317 681 Frontier Communications of Am

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8402 1628 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 698 188 172 BILISIM TELEKOM
12479 689 678 70 France Telecom Espana SA
31148 684 37 9 FreeNet ISP
6830 654 2215 425 UPC Broadband
20940 645 215 512 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 503 362 71 Bezeq International
3320 489 8442 402 Deutsche Telekom AG

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
10620 1920 340 201 Types of queries are: POCs, o
28573 1888 1171 59 Types of queries are: POCs, o
6503 1524 418 67 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1336 3035 332 Uninet S.A. de C.V.
26615 902 760 32 Tim Celular S.A.
27947 664 73 94 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
22047 583 326 15 Types of queries are: POCs, o
3816 558 234 113 Types of queries are: POCs, o

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8452 1370 958 13 TEDATA
24863 843 274 32 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 205 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
15706 165 32 6 Sudatel Internet Exchange Aut
16637 162 666 87 MTN Network Solutions
29571 157 15 16 Ci Telecom Autonomous system

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 3412 3807 193 BellSouth.net Inc.
7029 3374 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
4766 1979 11104 729 Korea Telecom (KIX)
10620 1920 340 201 Types of queries are: POCs, o
1785 1908 680 130 PaeTec Communications, Inc.
28573 1888 1171 59 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1666 301 87 TPG Internet Pty Ltd
20115 1639 1566 616 Charter Communications

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
7029 3374 3203 Windstream Communications Inc
18566 2094 1913 Covad Communications Co.
28573 1888 1829 Types of queries are: POCs, o
1785 1908 1778 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1920 1719 Types of queries are: POCs, o
8402 1628 1612 Corbina telecom
7545 1666 1579 TPG Internet Pty Ltd
22773 1608 1487 Cox Communications Inc.
6503 1524 1457 Axtel, S.A.B. de C.V.

Complete listing at http://thyme.rand.apnic.net/london/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
65333 PRIVATE 10.0.0.0/8 0 *
32805 UNALLOCATED 12.1.225.0/24 7018 AT&T Services, Inc.
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T Services, Inc.
16504 UNALLOCATED 12.18.155.0/24 30170 Optic Fusion
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T Services, Inc.
26095 UNALLOCATED 12.34.8.0/24 7018 AT&T Services, Inc.
21861 UNALLOCATED 12.37.59.0/24 7018 AT&T Services, Inc.
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T Services, Inc.
19577 UNALLOCATED 12.41.188.0/24 7832 WW/Precision Communi
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T Services, Inc.

Complete listing at http://thyme.rand.apnic.net/london/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
10.0.0.0/8 65333 Internet Assigned Numbers Aut
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project
169.254.0.0/16 65333 Internet Assigned Numbers Aut
172.16.0.0/12 65333 Internet Assigned Numbers Aut
192.0.2.0/24 65333 Internet Assigned Numbers Aut
192.168.0.0/16 0 *
198.18.0.0/15 65333 Internet Assigned Numbers Aut

Complete listing at http://thyme.rand.apnic.net/london/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/london/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 /10:30 /11:81 /12:236
/13:460 /14:830 /15:1499 /16:12248 /17:6262 /18:10520
/19:20657 /20:29337 /21:30504 /22:40063 /23:38076 /24:213265
/25:11 /26:21 /27:19 /28:153 /29:152 /30:77
/31:0 /32:138

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

ASN No of nets Total ann. Description
7029 3015 3374 Windstream Communications Inc
6389 2131 3412 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1734 1920 Types of queries are: POCs, o
8402 1606 1628 Corbina telecom
30036 1348 1407 Mediacom Communications Corp
6503 1278 1524 Axtel, S.A.B. de C.V.
8452 1171 1370 TEDATA
11492 1150 1187 CABLE ONE, INC.
7011 1073 1188 Frontier Communications of Am

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

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

1:553 2:676 4:13 5:36 6:3 8:419
12:1970 13:1 14:613 15:12 16:3 17:5
20:23 23:170 24:1770 27:1317 31:1046 32:52
33:2 34:2 36:8 37:633 38:804 40:121
41:3190 42:138 44:3 46:1426 47:3 49:448
50:547 52:13 54:12 55:9 56:3 57:27
58:912 59:491 60:248 61:1110 62:1001 63:2003
64:4229 65:2246 66:4464 67:2009 68:1159 69:3196
70:932 71:494 72:1824 74:2600 75:494 76:328
77:942 78:980 79:494 80:1223 81:937 82:666
83:543 84:493 85:1211 86:441 87:911 88:334
89:1720 90:290 91:4853 92:549 93:1361 94:1518
95:1166 96:357 97:313 98:864 99:35 100:7
101:202 103:1085 106:104 107:185 108:292 109:1339
110:743 111:918 112:399 113:588 114:622 115:835
116:915 117:705 118:905 119:1202 120:349 121:674
122:1624 123:1092 124:1323 125:1259 128:504 129:190
130:240 131:627 132:281 133:22 134:238 135:62
136:206 137:184 138:359 139:184 140:469 141:250
142:396 143:546 144:534 145:71 146:500 147:282
148:751 149:305 150:185 151:177 152:466 153:172
154:11 155:418 156:219 157:336 158:184 159:483
160:337 161:241 162:344 163:180 164:597 165:399
166:592 167:468 168:859 169:125 170:875 171:132
172:4 173:1754 174:581 175:423 176:533 177:816
178:1381 180:1196 181:88 182:1015 183:226 184:498
185:1 186:2296 187:1089 188:1294 189:1801 190:5531
192:5967 193:5552 194:4526 195:3414 196:1189 197:149
198:3614 199:4621 200:5760 201:1939 202:8330 203:8486
204:4258 205:2528 206:2675 207:2730 208:4051 209:3603
210:2693 211:1512 212:2005 213:1934 214:843 215:102
216:5080 217:1546 218:536 219:303 220:1235 221:545
222:285 223:347

End of report
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