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 21, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Tue 22 May, 2012

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

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

BGP routing table entries examined: 402748
Prefixes after maximum aggregation: 171783
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199750
Total ASes present in the Internet Routing Table: 38545
Prefixes per ASN: 10.45
Origin-only ASes present in the Internet Routing Table: 33253
Origin ASes announcing only one prefix: 15678
Transit ASes present in the Internet Routing Table: 5292
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: 40
Max AS path prepend of ASN (22394) 35
Prefixes from unregistered ASNs in the Routing Table: 1166
Unregistered ASNs in the Routing Table: 228
Number of 32-bit ASNs allocated by the RIRs: 2727
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5933
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 109
Number of addresses announced to Internet: 2571620352
Equivalent to 153 /8s, 71 /16s and 208 /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: 92.7
Total number of prefixes smaller than registry allocations: 170439

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

Prefixes being announced by APNIC Region ASes: 94547
Total APNIC prefixes after maximum aggregation: 30979
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 92036
Unique aggregates announced from the APNIC address blocks: 40028
APNIC Region origin ASes present in the Internet Routing Table: 4647
APNIC Prefixes per ASN: 19.81
APNIC Region origin ASes announcing only one prefix: 1263
APNIC Region transit ASes present in the Internet Routing Table: 706
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: 645039104
Equivalent to 38 /8s, 114 /16s and 132 /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: 149909
Total ARIN prefixes after maximum aggregation: 76167
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120815
Unique aggregates announced from the ARIN address blocks: 51030
ARIN Region origin ASes present in the Internet Routing Table: 15066
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5746
ARIN Region transit ASes present in the Internet Routing Table: 1523
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 812262656
Equivalent to 48 /8s, 106 /16s and 37 /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: 101449
Total RIPE prefixes after maximum aggregation: 54318
RIPE Deaggregation factor: 1.87
Prefixes being announced from the RIPE address blocks: 93624
Unique aggregates announced from the RIPE address blocks: 59128
RIPE Region origin ASes present in the Internet Routing Table: 16563
RIPE Prefixes per ASN: 5.65
RIPE Region origin ASes announcing only one prefix: 8060
RIPE Region transit ASes present in the Internet Routing Table: 2593
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: 513700864
Equivalent to 30 /8s, 158 /16s and 116 /24s
Percentage of available RIPE address space announced: 82.8

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: 40876
Total LACNIC prefixes after maximum aggregation: 8159
LACNIC Deaggregation factor: 5.01
Prefixes being announced from the LACNIC address blocks: 41079
Unique aggregates announced from the LACNIC address blocks: 20442
LACNIC Region origin ASes present in the Internet Routing Table: 1584
LACNIC Prefixes per ASN: 25.93
LACNIC Region origin ASes announcing only one prefix: 442
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: 101133568
Equivalent to 6 /8s, 7 /16s and 45 /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: 9208
Total AfriNIC prefixes after maximum aggregation: 2096
AfriNIC Deaggregation factor: 4.39
Prefixes being announced from the AfriNIC address blocks: 7370
Unique aggregates announced from the AfriNIC address blocks: 2201
AfriNIC Region origin ASes present in the Internet Routing Table: 537
AfriNIC Prefixes per ASN: 13.72
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 116
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: 31777536
Equivalent to 1 /8s, 228 /16s and 227 /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 1981 11105 733 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1664 301 87 TPG Internet Pty Ltd
4755 1553 384 152 TATA Communications formerly
9829 1295 1085 28 National Internet Backbone
9583 1160 87 499 Sify Limited
7552 1129 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 64 BHARTI Airtel Ltd.
18101 948 131 155 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 3401 1016 170 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
1785 1905 680 130 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1607 2911 121 Cox Communications Inc.
4323 1560 1056 376 tw telecom holdings, inc.
30036 1416 262 753 Mediacom Communications Corp
7018 1231 10063 829 AT&T Services, Inc.
7011 1187 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 1595 544 16 Corbina telecom
34984 696 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 676 671 67 France Telecom Espana SA
2118 658 97 14 EUnet/RELCOM Autonomous Syste
6830 655 2215 426 UPC Broadband
20940 641 215 509 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 492 360 80 Bezeq International
3320 486 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 1902 337 202 Types of queries are: POCs, o
28573 1851 1153 61 Types of queries are: POCs, o
6503 1519 418 68 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1335 3010 335 Uninet S.A. de C.V.
26615 902 760 32 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 581 244 98 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 1336 957 12 TEDATA
24863 842 274 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 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
15706 164 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 3415 3807 194 BellSouth.net Inc.
7029 3401 1016 170 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
4766 1981 11105 733 Korea Telecom (KIX)
1785 1905 680 130 PaeTec Communications, Inc.
10620 1902 337 202 Types of queries are: POCs, o
28573 1851 1153 61 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1664 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 3401 3231 Windstream Communications Inc
18566 2096 1918 Covad Communications Co.
28573 1851 1790 Types of queries are: POCs, o
1785 1905 1775 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1902 1700 Types of queries are: POCs, o
8402 1595 1579 Corbina telecom
7545 1664 1577 TPG Internet Pty Ltd
22773 1607 1486 Cox Communications Inc.
6503 1519 1451 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
5.43.128.0/19 48642 K Telecom Ltd.
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
/13:461 /14:830 /15:1497 /16:12189 /17:6234 /18:10507
/19:20747 /20:29304 /21:30407 /22:39794 /23:38006 /24:211832
/25:11 /26:21 /27:20 /28:151 /29:148 /30:74
/31:0 /32:136

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

ASN No of nets Total ann. Description
7029 3040 3401 Windstream Communications Inc
6389 2133 3415 BellSouth.net Inc.
18566 2045 2096 Covad Communications Co.
10620 1726 1902 Types of queries are: POCs, o
8402 1573 1595 Corbina telecom
30036 1357 1416 Mediacom Communications Corp
6503 1275 1519 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1138 1336 TEDATA
7011 1072 1187 Frontier Communications of Am

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

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

1:544 2:685 4:13 5:34 6:3 8:414
12:1971 13:1 14:611 15:12 16:3 17:5
20:23 23:168 24:1767 27:1293 31:1047 32:52
33:2 34:2 36:8 37:479 38:804 40:122
41:3198 42:136 44:3 46:1428 47:3 49:400
50:544 52:13 54:11 55:9 56:3 57:28
58:911 59:476 60:247 61:1123 62:996 63:2044
64:4169 65:2237 66:4476 67:2011 68:1160 69:3191
70:904 71:489 72:1823 74:2594 75:493 76:326
77:942 78:978 79:488 80:1211 81:927 82:668
83:542 84:487 85:1208 86:436 87:909 88:333
89:1706 90:289 91:4840 92:546 93:1326 94:1517
95:1137 96:362 97:313 98:884 99:35 100:7
101:186 103:1066 106:104 107:185 108:279 109:1337
110:753 111:909 112:398 113:584 114:616 115:828
116:911 117:701 118:907 119:1200 120:348 121:675
122:1619 123:1099 124:1320 125:1251 128:506 129:189
130:244 131:627 132:172 133:22 134:239 135:62
136:212 137:239 138:358 139:182 140:467 141:242
142:395 143:547 144:536 145:70 146:499 147:293
148:749 149:296 150:187 151:177 152:466 153:172
154:11 155:416 156:220 157:337 158:185 159:479
160:337 161:243 162:344 163:180 164:598 165:402
166:570 167:468 168:858 169:125 170:782 171:131
172:4 173:1752 174:589 175:423 176:529 177:760
178:1380 180:1202 181:85 182:981 183:291 184:496
185:1 186:2295 187:1076 188:1274 189:1798 190:5517
192:5938 193:5439 194:4184 195:3208 196:1174 197:145
198:3599 199:4596 200:5777 201:1925 202:8319 203:8512
204:4256 205:2531 206:2684 207:2728 208:4050 209:3609
210:2690 211:1500 212:2034 213:1946 214:851 215:102
216:5086 217:1535 218:536 219:307 220:1232 221:538
222:296 223:342

End of report
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