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, April 26, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 27 Apr, 2012

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

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

BGP routing table entries examined: 401394
Prefixes after maximum aggregation: 170906
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 197955
Total ASes present in the Internet Routing Table: 38405
Prefixes per ASN: 10.45
Origin-only ASes present in the Internet Routing Table: 33102
Origin ASes announcing only one prefix: 15629
Transit ASes present in the Internet Routing Table: 5303
Transit-only ASes present in the Internet Routing Table: 127
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: 1204
Unregistered ASNs in the Routing Table: 219
Number of 32-bit ASNs allocated by the RIRs: 2631
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5616
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 120
Number of addresses announced to Internet: 2557418496
Equivalent to 152 /8s, 111 /16s and 28 /24s
Percentage of available address space announced: 69.0
Percentage of allocated address space announced: 69.1
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.4
Total number of prefixes smaller than registry allocations: 170200

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

Prefixes being announced by APNIC Region ASes: 93982
Total APNIC prefixes after maximum aggregation: 30872
APNIC Deaggregation factor: 3.04
Prefixes being announced from the APNIC address blocks: 91497
Unique aggregates announced from the APNIC address blocks: 39898
APNIC Region origin ASes present in the Internet Routing Table: 4640
APNIC Prefixes per ASN: 19.72
APNIC Region origin ASes announcing only one prefix: 1268
APNIC Region transit ASes present in the Internet Routing Table: 712
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: 644002048
Equivalent to 38 /8s, 98 /16s and 177 /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: 149938
Total ARIN prefixes after maximum aggregation: 75928
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121297
Unique aggregates announced from the ARIN address blocks: 50351
ARIN Region origin ASes present in the Internet Routing Table: 14997
ARIN Prefixes per ASN: 8.09
ARIN Region origin ASes announcing only one prefix: 5721
ARIN Region transit ASes present in the Internet Routing Table: 1517
Average ARIN Region AS path length visible: 3.2
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: 807237888
Equivalent to 48 /8s, 29 /16s and 121 /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: 102118
Total RIPE prefixes after maximum aggregation: 53793
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 94066
Unique aggregates announced from the RIPE address blocks: 58334
RIPE Region origin ASes present in the Internet Routing Table: 16489
RIPE Prefixes per ASN: 5.70
RIPE Region origin ASes announcing only one prefix: 8030
RIPE Region transit ASes present in the Internet Routing Table: 2579
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: 510775808
Equivalent to 30 /8s, 113 /16s and 210 /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: 40124
Total LACNIC prefixes after maximum aggregation: 8125
LACNIC Deaggregation factor: 4.94
Prefixes being announced from the LACNIC address blocks: 40156
Unique aggregates announced from the LACNIC address blocks: 20300
LACNIC Region origin ASes present in the Internet Routing Table: 1583
LACNIC Prefixes per ASN: 25.37
LACNIC Region origin ASes announcing only one prefix: 445
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: 99447552
Equivalent to 5 /8s, 237 /16s and 115 /24s
Percentage of available LACNIC address space announced: 65.9

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: 8793
Total AfriNIC prefixes after maximum aggregation: 2120
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 6884
Unique aggregates announced from the AfriNIC address blocks: 2213
AfriNIC Region origin ASes present in the Internet Routing Table: 530
AfriNIC Prefixes per ASN: 12.99
AfriNIC Region origin ASes announcing only one prefix: 165
AfriNIC Region transit ASes present in the Internet Routing Table: 117
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: 31763712
Equivalent to 1 /8s, 228 /16s and 173 /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 1922 11104 692 Korea Telecom (KIX)
17974 1733 508 72 PT Telekomunikasi Indonesia
7545 1657 301 87 TPG Internet Pty Ltd
4755 1575 386 163 TATA Communications formerly
9829 1260 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 957 1938 287 CNCGROUP IP network China169
9498 951 291 64 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 3425 3807 197 BellSouth.net Inc.
7029 3401 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 1597 1060 384 tw telecom holdings, inc.
22773 1579 2910 114 Cox Communications Inc.
30036 1418 260 767 Mediacom Communications Corp
7018 1254 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 1635 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
31148 681 37 9 FreeNet ISP
34984 680 188 173 BILISIM TELEKOM
6830 655 2215 426 UPC Broadband
12479 642 666 62 France Telecom Espana SA
20940 629 205 497 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 1832 329 171 Types of queries are: POCs, o
28573 1795 1112 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 902 697 32 Tim Celular S.A.
27947 662 74 98 Telconet S.A
11172 641 107 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 1303 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 197 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 164 666 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 3425 3807 197 BellSouth.net Inc.
7029 3401 1016 170 Windstream Communications Inc
18566 2092 382 179 Covad Communications Co.
4766 1922 11104 692 Korea Telecom (KIX)
1785 1908 681 130 PaeTec Communications, Inc.
10620 1832 329 171 Types of queries are: POCs, o
28573 1795 1112 62 Types of queries are: POCs, o
17974 1733 508 72 PT Telekomunikasi Indonesia
7545 1657 301 87 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 3401 3231 Windstream Communications Inc
18566 2092 1913 Covad Communications Co.
1785 1908 1778 PaeTec Communications, Inc.
28573 1795 1733 Types of queries are: POCs, o
10620 1832 1661 Types of queries are: POCs, o
17974 1733 1661 PT Telekomunikasi Indonesia
8402 1635 1619 Corbina telecom
7545 1657 1570 TPG Internet Pty Ltd
22773 1579 1465 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
5.1.56.0/21 23456 32-bit ASN transition
5.8.184.0/21 29286 Skylogic Italia Autonomous Sy
5.9.0.0/16 24940 Hetzner Online AG RZ-Nuernber
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 /10:28 /11:81 /12:236
/13:460 /14:828 /15:1488 /16:12190 /17:6212 /18:10452
/19:20615 /20:28860 /21:29776 /22:40136 /23:37739 /24:211696
/25:11 /26:21 /27:20 /28:155 /29:149 /30:73
/31:0 /32:136

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

ASN No of nets Total ann. Description
7029 3041 3401 Windstream Communications Inc
6389 2142 3425 BellSouth.net Inc.
18566 2041 2092 Covad Communications Co.
10620 1709 1832 Types of queries are: POCs, o
8402 1613 1635 Corbina telecom
30036 1362 1418 Mediacom Communications Corp
6503 1281 1522 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1103 1303 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 2:696 4:14 6:3 8:406 12:1980
13:1 14:602 15:12 16:3 17:7 20:23
23:166 24:1754 27:1267 31:972 32:52 33:2
34:2 36:8 37:417 38:794 40:118 41:3057
42:134 44:3 46:1486 47:3 49:401 50:536
52:13 54:8 55:10 56:3 57:27 58:915
59:513 60:248 61:1171 62:981 63:1986 64:4252
65:2252 66:4471 67:2139 68:1206 69:3208 70:1222
71:484 72:1846 74:2600 75:494 76:344 77:940
78:1006 79:486 80:1207 81:900 82:682 83:549
84:482 85:1198 86:420 87:929 88:344 89:1640
90:291 91:4754 92:523 93:1370 94:1510 95:1153
96:353 97:315 98:895 99:34 100:7 101:168
103:1006 106:102 107:191 108:250 109:1277 110:735
111:915 112:443 113:581 114:637 115:871 116:900
117:700 118:907 119:1172 120:347 121:787 122:1623
123:1098 124:1296 125:1235 128:503 129:189 130:249
131:620 132:173 133:22 134:232 135:62 136:200
137:173 138:355 139:146 140:465 141:239 142:389
143:391 144:517 145:74 146:496 147:277 148:747
149:305 150:151 151:175 152:462 153:171 154:11
155:417 156:212 157:335 158:175 159:468 160:337
161:238 162:343 163:181 164:577 165:402 166:572
167:468 168:812 169:127 170:860 171:127 172:2
173:1756 174:572 175:424 176:442 177:653 178:1347
180:1177 181:79 182:798 183:289 184:458 185:1
186:2237 187:1053 188:1221 189:1784 190:5499 192:5972
193:5530 194:4653 195:3581 196:1259 197:125 198:3610
199:4494 200:5712 201:1923 202:8232 203:8485 204:4249
205:2479 206:2659 207:2746 208:4083 209:3666 210:2672
211:1454 212:2019 213:1926 214:845 215:103 216:5127
217:1530 218:529 219:335 220:1226 221:540 222:295
223:322

End of report
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