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 - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sat 28 Apr, 2012

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

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

BGP routing table entries examined: 400152
Prefixes after maximum aggregation: 170868
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198039
Total ASes present in the Internet Routing Table: 38409
Prefixes per ASN: 10.42
Origin-only ASes present in the Internet Routing Table: 33105
Origin ASes announcing only one prefix: 15632
Transit ASes present in the Internet Routing Table: 5304
Transit-only ASes present in the Internet Routing Table: 123
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 1206
Unregistered ASNs in the Routing Table: 220
Number of 32-bit ASNs allocated by the RIRs: 2635
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5613
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 112
Number of addresses announced to Internet: 2562167808
Equivalent to 152 /8s, 183 /16s and 148 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.2
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: 169333

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

Prefixes being announced by APNIC Region ASes: 93653
Total APNIC prefixes after maximum aggregation: 30836
APNIC Deaggregation factor: 3.04
Prefixes being announced from the APNIC address blocks: 91149
Unique aggregates announced from the APNIC address blocks: 39906
APNIC Region origin ASes present in the Internet Routing Table: 4642
APNIC Prefixes per ASN: 19.64
APNIC Region origin ASes announcing only one prefix: 1270
APNIC Region transit ASes present in the Internet Routing Table: 711
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: 644093952
Equivalent to 38 /8s, 100 /16s and 24 /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: 148972
Total ARIN prefixes after maximum aggregation: 75855
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120333
Unique aggregates announced from the ARIN address blocks: 50401
ARIN Region origin ASes present in the Internet Routing Table: 14994
ARIN Prefixes per ASN: 8.03
ARIN Region origin ASes announcing only one prefix: 5722
ARIN Region transit ASes present in the Internet Routing Table: 1513
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 29
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 807235584
Equivalent to 48 /8s, 29 /16s and 112 /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: 102057
Total RIPE prefixes after maximum aggregation: 53842
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 93970
Unique aggregates announced from the RIPE address blocks: 58378
RIPE Region origin ASes present in the Internet Routing Table: 16498
RIPE Prefixes per ASN: 5.70
RIPE Region origin ASes announcing only one prefix: 8031
RIPE Region transit ASes present in the Internet Routing Table: 2589
Average RIPE Region AS path length visible: 3.5
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: 510907904
Equivalent to 30 /8s, 115 /16s and 214 /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: 40187
Total LACNIC prefixes after maximum aggregation: 8132
LACNIC Deaggregation factor: 4.94
Prefixes being announced from the LACNIC address blocks: 40216
Unique aggregates announced from the LACNIC address blocks: 20292
LACNIC Region origin ASes present in the Internet Routing Table: 1581
LACNIC Prefixes per ASN: 25.44
LACNIC Region origin ASes announcing only one prefix: 443
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: 17
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 99695360
Equivalent to 5 /8s, 241 /16s and 59 /24s
Percentage of available LACNIC address space announced: 66.0

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: 8863
Total AfriNIC prefixes after maximum aggregation: 2135
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 6952
Unique aggregates announced from the AfriNIC address blocks: 2217
AfriNIC Region origin ASes present in the Internet Routing Table: 532
AfriNIC Prefixes per ASN: 13.07
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 116
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: 31782912
Equivalent to 1 /8s, 228 /16s and 248 /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 1735 508 72 PT Telekomunikasi Indonesia
7545 1658 301 88 TPG Internet Pty Ltd
4755 1552 384 153 TATA Communications formerly
9829 1261 1069 30 National Internet Backbone
9583 1146 85 491 Sify Limited
7552 1100 1062 11 Vietel Corporation
24560 1025 385 167 Bharti Airtel Ltd., Telemedia
4808 956 1938 287 CNCGROUP IP network China169
9498 954 291 65 BHARTI Airtel Ltd.

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 3426 3807 195 BellSouth.net Inc.
7029 3404 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications Co.
1785 1908 681 130 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1596 1060 384 tw telecom holdings, inc.
22773 1580 2910 114 Cox Communications Inc.
30036 1420 261 768 Mediacom Communications Corp
7018 1256 9807 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 1566 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
31148 681 37 9 FreeNet ISP
34984 681 188 173 BILISIM TELEKOM
6830 655 2215 426 UPC Broadband
12479 646 668 66 France Telecom Espana SA
20940 623 205 497 Akamai Technologies European
9116 541 326 32 Goldenlines main autonomous s
3320 531 8441 397 Deutsche Telekom AG
8551 502 360 80 Bezeq International

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 1851 332 177 Types of queries are: POCs, o
28573 1805 1114 62 Types of queries are: POCs, o
6503 1522 418 66 Axtel, S.A.B. de C.V.
7303 1362 829 187 Telecom Argentina S.A.
8151 1341 2982 338 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 663 74 98 Telconet S.A
11172 640 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 575 242 100 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 1309 958 13 TEDATA
24863 837 274 32 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 195 12 24 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 163 666 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 3426 3807 195 BellSouth.net Inc.
7029 3404 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications Co.
4766 1916 11104 692 Korea Telecom (KIX)
1785 1908 681 130 PaeTec Communications, Inc.
10620 1851 332 177 Types of queries are: POCs, o
28573 1805 1114 62 Types of queries are: POCs, o
17974 1735 508 72 PT Telekomunikasi Indonesia
7545 1658 301 88 TPG Internet Pty Ltd
20115 1639 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 3404 3234 Windstream Communications Inc
18566 2092 1913 Covad Communications Co.
1785 1908 1778 PaeTec Communications, Inc.
28573 1805 1743 Types of queries are: POCs, o
10620 1851 1674 Types of queries are: POCs, o
17974 1735 1663 PT Telekomunikasi Indonesia
7545 1658 1570 TPG Internet Pty Ltd
8402 1566 1550 Corbina telecom
22773 1580 1466 Cox Communications Inc.
6503 1522 1456 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
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/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 /10:29 /11:81 /12:236
/13:460 /14:830 /15:1488 /16:12196 /17:6215 /18:10444
/19:20610 /20:28838 /21:29747 /22:40052 /23:37652 /24:210695
/25:11 /26:21 /27:18 /28:152 /29:141 /30:71
/31:0 /32:133

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

ASN No of nets Total ann. Description
7029 3044 3404 Windstream Communications Inc
6389 2143 3426 BellSouth.net Inc.
18566 2041 2092 Covad Communications Co.
10620 1712 1851 Types of queries are: POCs, o
8402 1544 1566 Corbina telecom
30036 1364 1420 Mediacom Communications Corp
6503 1281 1522 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1109 1309 TEDATA
1785 1072 1908 PaeTec Communications, Inc.

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

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

1:537 2:533 4:10 6:3 8:406 12:1972
13:1 14:605 15:12 16:3 17:5 20:23
23:165 24:1750 27:1268 31:974 32:52 33:2
34:2 36:8 37:421 38:794 40:118 41:3111
42:135 44:3 46:1484 47:3 49:401 50:537
52:13 54:8 55:9 56:3 57:27 58:918
59:484 60:248 61:1101 62:974 63:1986 64:4168
65:2253 66:4469 67:2020 68:1165 69:3188 70:902
71:484 72:1825 74:2602 75:494 76:318 77:940
78:963 79:484 80:1205 81:901 82:680 83:549
84:481 85:1198 86:419 87:932 88:340 89:1609
90:291 91:4763 92:522 93:1505 94:1499 95:897
96:353 97:315 98:894 99:34 100:7 101:177
103:1000 106:102 107:191 108:251 109:1297 110:733
111:918 112:443 113:583 114:637 115:798 116:903
117:700 118:908 119:1188 120:347 121:670 122:1636
123:1101 124:1296 125:1240 128:523 129:189 130:249
131:623 132:173 133:22 134:232 135:62 136:213
137:174 138:355 139:161 140:465 141:242 142:389
143:386 144:517 145:74 146:494 147:278 148:747
149:305 150:151 151:181 152:462 153:172 154:11
155:413 156:212 157:334 158:176 159:468 160:337
161:238 162:345 163:181 164:576 165:402 166:572
167:468 168:814 169:127 170:858 171:127 172:2
173:1755 174:572 175:424 176:683 177:657 178:1349
180:1179 181:79 182:800 183:289 184:461 185:1
186:2241 187:1058 188:1239 189:1783 190:5488 192:5968
193:5538 194:4656 195:3591 196:1251 197:129 198:3604
199:4492 200:5711 201:1923 202:8251 203:8494 204:4249
205:2480 206:2658 207:2725 208:4049 209:3608 210:2658
211:1454 212:2004 213:1928 214:842 215:103 216:5113
217:1532 218:530 219:314 220:1226 221:540 222:295
223:324

End of report
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