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, May 17, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 18 May, 2012

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

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

BGP routing table entries examined: 401766
Prefixes after maximum aggregation: 171769
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199465
Total ASes present in the Internet Routing Table: 38527
Prefixes per ASN: 10.43
Origin-only ASes present in the Internet Routing Table: 33238
Origin ASes announcing only one prefix: 15689
Transit ASes present in the Internet Routing Table: 5289
Transit-only ASes present in the Internet Routing Table: 113
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 27
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 1168
Unregistered ASNs in the Routing Table: 228
Number of 32-bit ASNs allocated by the RIRs: 2705
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5921
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 110
Number of addresses announced to Internet: 2571437824
Equivalent to 153 /8s, 69 /16s and 7 /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: 92.6
Total number of prefixes smaller than registry allocations: 170527

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

Prefixes being announced by APNIC Region ASes: 94359
Total APNIC prefixes after maximum aggregation: 30967
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91847
Unique aggregates announced from the APNIC address blocks: 40009
APNIC Region origin ASes present in the Internet Routing Table: 4648
APNIC Prefixes per ASN: 19.76
APNIC Region origin ASes announcing only one prefix: 1265
APNIC Region transit ASes present in the Internet Routing Table: 704
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: 644681728
Equivalent to 38 /8s, 109 /16s and 16 /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: 150031
Total ARIN prefixes after maximum aggregation: 76262
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120824
Unique aggregates announced from the ARIN address blocks: 50962
ARIN Region origin ASes present in the Internet Routing Table: 15062
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5749
ARIN Region transit ASes present in the Internet Routing Table: 1522
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: 812224000
Equivalent to 48 /8s, 105 /16s and 142 /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: 100765
Total RIPE prefixes after maximum aggregation: 54172
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 92994
Unique aggregates announced from the RIPE address blocks: 58835
RIPE Region origin ASes present in the Internet Routing Table: 16544
RIPE Prefixes per ASN: 5.62
RIPE Region origin ASes announcing only one prefix: 8063
RIPE Region transit ASes present in the Internet Routing Table: 2585
Average RIPE Region AS path length visible: 3.6
Max RIPE Region AS path length visible: 27
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 513225472
Equivalent to 30 /8s, 151 /16s and 51 /24s
Percentage of available RIPE address space announced: 82.7

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: 40666
Total LACNIC prefixes after maximum aggregation: 8143
LACNIC Deaggregation factor: 4.99
Prefixes being announced from the LACNIC address blocks: 40885
Unique aggregates announced from the LACNIC address blocks: 20445
LACNIC Region origin ASes present in the Internet Routing Table: 1584
LACNIC Prefixes per ASN: 25.81
LACNIC Region origin ASes announcing only one prefix: 444
LACNIC Region transit ASes present in the Internet Routing Table: 288
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: 100708352
Equivalent to 6 /8s, 0 /16s and 176 /24s
Percentage of available LACNIC address space announced: 66.7

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: 9192
Total AfriNIC prefixes after maximum aggregation: 2161
AfriNIC Deaggregation factor: 4.25
Prefixes being announced from the AfriNIC address blocks: 7230
Unique aggregates announced from the AfriNIC address blocks: 2225
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.39
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: 31822592
Equivalent to 1 /8s, 229 /16s and 147 /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 1969 11104 725 Korea Telecom (KIX)
17974 1831 530 80 PT Telekomunikasi Indonesia
7545 1660 301 87 TPG Internet Pty Ltd
4755 1552 384 152 TATA Communications formerly
9829 1285 1085 28 National Internet Backbone
9583 1157 87 500 Sify Limited
7552 1129 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 64 BHARTI Airtel Ltd.
18101 947 131 155 Reliance Infocom Ltd Internet

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 3415 3807 194 BellSouth.net Inc.
7029 3402 1016 170 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1904 680 130 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1606 2911 121 Cox Communications Inc.
4323 1579 1058 382 tw telecom holdings, inc.
30036 1416 263 753 Mediacom Communications Corp
7018 1224 10039 830 AT&T Services, Inc.
11492 1186 216 364 CABLE ONE, INC.

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 1580 544 16 Corbina telecom
34984 695 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 676 671 69 France Telecom Espana SA
6830 655 2215 426 UPC Broadband
20940 643 215 509 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 492 360 80 Bezeq International
3320 485 8442 401 Deutsche Telekom AG
3292 471 2108 406 TDC Data Networks

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 1903 338 181 Types of queries are: POCs, o
28573 1863 1153 59 Types of queries are: POCs, o
6503 1517 418 67 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1332 3000 333 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 666 73 95 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 580 244 99 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 1308 957 12 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
3741 262 905 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
15399 192 29 13 Wananchi Online Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 164 32 6 Sudatel Internet Exchange Aut
16637 161 666 86 MTN Network Solutions

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 3415 3807 194 BellSouth.net Inc.
7029 3402 1016 170 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1969 11104 725 Korea Telecom (KIX)
1785 1904 680 130 PaeTec Communications, Inc.
10620 1903 338 181 Types of queries are: POCs, o
28573 1863 1153 59 Types of queries are: POCs, o
17974 1831 530 80 PT Telekomunikasi Indonesia
7545 1660 301 87 TPG Internet Pty Ltd
20115 1637 1566 619 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 3402 3232 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
28573 1863 1804 Types of queries are: POCs, o
1785 1904 1774 PaeTec Communications, Inc.
17974 1831 1751 PT Telekomunikasi Indonesia
10620 1903 1722 Types of queries are: POCs, o
7545 1660 1573 TPG Internet Pty Ltd
8402 1580 1564 Corbina telecom
22773 1606 1485 Cox Communications Inc.
6503 1517 1450 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
5.42.0.0/17 39493 KolomnaSviazTV AS Number
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

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 /15:1493 /16:12202 /17:6233 /18:10486
/19:20683 /20:29233 /21:30282 /22:39663 /23:37986 /24:211265
/25:11 /26:20 /27:19 /28:153 /29:151 /30:78
/31:0 /32:139

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

ASN No of nets Total ann. Description
7029 3041 3402 Windstream Communications Inc
6389 2133 3415 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1732 1903 Types of queries are: POCs, o
8402 1558 1580 Corbina telecom
30036 1357 1416 Mediacom Communications Corp
6503 1274 1517 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1110 1308 TEDATA
7011 1070 1185 Frontier Communications of Am

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

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

1:537 2:668 4:14 5:10 6:3 8:413
12:1972 13:1 14:602 15:12 16:3 17:5
20:23 23:169 24:1767 27:1289 31:978 32:52
33:2 34:2 36:8 37:473 38:804 40:121
41:3229 42:136 44:3 46:1424 47:3 49:406
50:544 52:13 54:10 55:10 56:3 57:28
58:910 59:476 60:247 61:1119 62:996 63:2047
64:4171 65:2245 66:4462 67:2010 68:1167 69:3202
70:905 71:489 72:1824 74:2602 75:492 76:325
77:932 78:970 79:488 80:1209 81:910 82:671
83:551 84:485 85:1210 86:444 87:920 88:333
89:1707 90:291 91:4843 92:543 93:1317 94:1526
95:1129 96:362 97:316 98:877 99:35 100:7
101:186 103:1052 106:103 107:187 108:274 109:1327
110:753 111:912 112:399 113:584 114:621 115:826
116:908 117:696 118:906 119:1194 120:347 121:672
122:1627 123:1100 124:1318 125:1251 128:518 129:190
130:245 131:628 132:172 133:22 134:239 135:62
136:212 137:237 138:358 139:182 140:466 141:244
142:395 143:565 144:523 145:70 146:499 147:292
148:742 149:303 150:183 151:177 152:467 153:172
154:11 155:419 156:219 157:337 158:183 159:477
160:338 161:239 162:344 163:180 164:592 165:402
166:570 167:469 168:858 169:125 170:867 171:131
172:4 173:1740 174:578 175:423 176:587 177:754
178:1371 180:1201 181:83 182:979 183:295 184:494
185:1 186:2299 187:1079 188:1270 189:1789 190:5498
192:5961 193:5297 194:3801 195:3213 196:1265 197:141
198:3608 199:4585 200:5713 201:1931 202:8303 203:8501
204:4257 205:2518 206:2681 207:2728 208:4053 209:3612
210:2677 211:1492 212:2036 213:1940 214:876 215:103
216:5081 217:1544 218:529 219:308 220:1235 221:541
222:295 223:326

End of report
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