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, May 13, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 14 May, 2012

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

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

BGP routing table entries examined: 400754
Prefixes after maximum aggregation: 171554
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199156
Total ASes present in the Internet Routing Table: 38496
Prefixes per ASN: 10.41
Origin-only ASes present in the Internet Routing Table: 33192
Origin ASes announcing only one prefix: 15672
Transit ASes present in the Internet Routing Table: 5304
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: 1161
Unregistered ASNs in the Routing Table: 224
Number of 32-bit ASNs allocated by the RIRs: 2692
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5852
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2570025984
Equivalent to 153 /8s, 47 /16s and 124 /24s
Percentage of available address space announced: 69.3
Percentage of allocated address space announced: 69.4
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: 169791

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

Prefixes being announced by APNIC Region ASes: 94446
Total APNIC prefixes after maximum aggregation: 30949
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91916
Unique aggregates announced from the APNIC address blocks: 39911
APNIC Region origin ASes present in the Internet Routing Table: 4638
APNIC Prefixes per ASN: 19.82
APNIC Region origin ASes announcing only one prefix: 1261
APNIC Region transit ASes present in the Internet Routing Table: 703
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: 644503296
Equivalent to 38 /8s, 106 /16s and 87 /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: 149504
Total ARIN prefixes after maximum aggregation: 76100
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120636
Unique aggregates announced from the ARIN address blocks: 50807
ARIN Region origin ASes present in the Internet Routing Table: 15047
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5742
ARIN Region transit ASes present in the Internet Routing Table: 1524
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: 812023040
Equivalent to 48 /8s, 102 /16s and 125 /24s
Percentage of available ARIN address space announced: 64.7

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: 100510
Total RIPE prefixes after maximum aggregation: 54139
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 92748
Unique aggregates announced from the RIPE address blocks: 58747
RIPE Region origin ASes present in the Internet Routing Table: 16549
RIPE Prefixes per ASN: 5.60
RIPE Region origin ASes announcing only one prefix: 8062
RIPE Region transit ASes present in the Internet Routing Table: 2602
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: 512938752
Equivalent to 30 /8s, 146 /16s and 211 /24s
Percentage of available RIPE address space announced: 82.6

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: 40647
Total LACNIC prefixes after maximum aggregation: 8151
LACNIC Deaggregation factor: 4.99
Prefixes being announced from the LACNIC address blocks: 40825
Unique aggregates announced from the LACNIC address blocks: 20512
LACNIC Region origin ASes present in the Internet Routing Table: 1583
LACNIC Prefixes per ASN: 25.79
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 290
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: 100202752
Equivalent to 5 /8s, 248 /16s and 249 /24s
Percentage of available LACNIC address space announced: 66.4

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: 8969
Total AfriNIC prefixes after maximum aggregation: 2149
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 7036
Unique aggregates announced from the AfriNIC address blocks: 2200
AfriNIC Region origin ASes present in the Internet Routing Table: 529
AfriNIC Prefixes per ASN: 13.30
AfriNIC Region origin ASes announcing only one prefix: 165
AfriNIC Region transit ASes present in the Internet Routing Table: 120
Average AfriNIC Region AS path length visible: 3.5
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: 31787776
Equivalent to 1 /8s, 229 /16s and 11 /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 11107 715 Korea Telecom (KIX)
17974 1779 510 73 PT Telekomunikasi Indonesia
7545 1659 301 86 TPG Internet Pty Ltd
4755 1574 386 159 TATA Communications formerly
9829 1283 1069 30 National Internet Backbone
9583 1156 86 500 Sify Limited
7552 1130 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 64 BHARTI Airtel Ltd.
4808 951 1938 284 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 3415 3807 193 BellSouth.net Inc.
7029 3412 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1902 680 130 PaeTec Communications, Inc.
20115 1638 1566 620 Charter Communications
22773 1596 2911 115 Cox Communications Inc.
4323 1570 1058 382 tw telecom holdings, inc.
30036 1409 262 748 Mediacom Communications Corp
7018 1256 10071 825 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 1623 544 16 Corbina telecom
34984 693 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 675 671 69 France Telecom Espana SA
6830 656 2215 426 UPC Broadband
20940 644 215 510 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 503 360 80 Bezeq International
3320 484 8442 400 Deutsche Telekom AG
3292 469 2104 403 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 1869 334 175 Types of queries are: POCs, o
28573 1847 1137 58 Types of queries are: POCs, o
6503 1517 418 68 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1331 2984 332 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 670 74 98 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 579 244 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 1307 958 13 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
24835 179 80 8 RAYA Telecom - Egypt
15706 165 32 6 Sudatel Internet Exchange Aut
16637 161 666 86 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 193 BellSouth.net Inc.
7029 3412 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1969 11107 715 Korea Telecom (KIX)
1785 1902 680 130 PaeTec Communications, Inc.
10620 1869 334 175 Types of queries are: POCs, o
28573 1847 1137 58 Types of queries are: POCs, o
17974 1779 510 73 PT Telekomunikasi Indonesia
7545 1659 301 86 TPG Internet Pty Ltd
20115 1638 1566 620 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 3412 3241 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
28573 1847 1789 Types of queries are: POCs, o
1785 1902 1772 PaeTec Communications, Inc.
17974 1779 1706 PT Telekomunikasi Indonesia
10620 1869 1694 Types of queries are: POCs, o
8402 1623 1607 Corbina telecom
7545 1659 1573 TPG Internet Pty Ltd
22773 1596 1481 Cox Communications Inc.
6503 1517 1449 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.
32567 UNALLOCATED 12.14.170.0/24 7018 AT&T Services, Inc.
16504 UNALLOCATED 12.18.155.0/24 30170 Optic Fusion
32567 UNALLOCATED 12.25.107.0/24 4323 tw telecom holdings,
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.

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 /14:828 /15:1494 /16:12191 /17:6218 /18:10482
/19:20674 /20:29190 /21:30062 /22:39469 /23:37885 /24:210854
/25:11 /26:21 /27:20 /28:151 /29:148 /30:76
/31:0 /32:141

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

ASN No of nets Total ann. Description
7029 3051 3412 Windstream Communications Inc
6389 2133 3415 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1715 1869 Types of queries are: POCs, o
8402 1601 1623 Corbina telecom
30036 1350 1409 Mediacom Communications Corp
6503 1274 1517 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1108 1307 TEDATA
7011 1069 1184 Frontier Communications of Am

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

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

1:541 2:641 4:14 5:3 6:3 8:411
12:1965 13:1 14:602 15:12 16:3 17:5
20:23 23:164 24:1765 27:1280 31:978 32:52
33:2 34:2 36:8 37:451 38:804 40:120
41:3108 42:136 44:3 46:1424 47:3 49:398
50:543 52:13 54:10 55:9 56:3 57:27
58:914 59:504 60:249 61:1190 62:986 63:2054
64:4167 65:2242 66:4455 67:2011 68:1164 69:3205
70:904 71:484 72:1821 74:2594 75:493 76:325
77:936 78:974 79:491 80:1214 81:894 82:673
83:553 84:486 85:1212 86:445 87:919 88:334
89:1693 90:290 91:4810 92:538 93:1443 94:1521
95:956 96:364 97:316 98:875 99:35 100:7
101:183 103:1036 106:103 107:187 108:266 109:1327
110:754 111:913 112:395 113:586 114:624 115:897
116:913 117:696 118:909 119:1199 120:346 121:782
122:1628 123:1100 124:1315 125:1246 128:520 129:188
130:245 131:624 132:172 133:22 134:238 135:62
136:212 137:175 138:334 139:181 140:466 141:242
142:396 143:428 144:519 145:70 146:491 147:284
148:747 149:305 150:148 151:176 152:464 153:172
154:11 155:417 156:218 157:336 158:183 159:476
160:336 161:235 162:344 163:180 164:582 165:389
166:571 167:468 168:854 169:125 170:864 171:131
172:2 173:1741 174:587 175:423 176:668 177:747
178:1364 180:1194 181:82 182:944 183:294 184:486
185:1 186:2285 187:1072 188:1270 189:1788 190:5547
192:5958 193:5298 194:3803 195:3208 196:1257 197:135
198:3597 199:4565 200:5750 201:1930 202:8268 203:8511
204:4258 205:2507 206:2672 207:2727 208:4072 209:3602
210:2678 211:1484 212:2038 213:1939 214:848 215:102
216:5082 217:1545 218:526 219:334 220:1228 221:541
222:294 223:328

End of report
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