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 27, 2012

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 404196
Prefixes after maximum aggregation: 172139
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 199988
Total ASes present in the Internet Routing Table: 38575
Prefixes per ASN: 10.48
Origin-only ASes present in the Internet Routing Table: 33285
Origin ASes announcing only one prefix: 15681
Transit ASes present in the Internet Routing Table: 5290
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: 26
Max AS path prepend of ASN (51742) 24
Prefixes from unregistered ASNs in the Routing Table: 1162
Unregistered ASNs in the Routing Table: 226
Number of 32-bit ASNs allocated by the RIRs: 2759
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6055
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 107
Number of addresses announced to Internet: 2574179072
Equivalent to 153 /8s, 110 /16s and 219 /24s
Percentage of available address space announced: 69.5
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: 92.8
Total number of prefixes smaller than registry allocations: 170674

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

Prefixes being announced by APNIC Region ASes: 94704
Total APNIC prefixes after maximum aggregation: 30954
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 92175
Unique aggregates announced from the APNIC address blocks: 40115
APNIC Region origin ASes present in the Internet Routing Table: 4651
APNIC Prefixes per ASN: 19.82
APNIC Region origin ASes announcing only one prefix: 1266
APNIC Region transit ASes present in the Internet Routing Table: 709
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: 645534976
Equivalent to 38 /8s, 122 /16s and 21 /24s
Percentage of available APNIC address space announced: 81.9

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: 150027
Total ARIN prefixes after maximum aggregation: 76377
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120780
Unique aggregates announced from the ARIN address blocks: 51059
ARIN Region origin ASes present in the Internet Routing Table: 15079
ARIN Prefixes per ASN: 8.01
ARIN Region origin ASes announcing only one prefix: 5746
ARIN Region transit ASes present in the Internet Routing Table: 1519
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: 812282368
Equivalent to 48 /8s, 106 /16s and 114 /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: 102347
Total RIPE prefixes after maximum aggregation: 54446
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94499
Unique aggregates announced from the RIPE address blocks: 59074
RIPE Region origin ASes present in the Internet Routing Table: 16579
RIPE Prefixes per ASN: 5.70
RIPE Region origin ASes announcing only one prefix: 8062
RIPE Region transit ASes present in the Internet Routing Table: 2591
Average RIPE Region AS path length visible: 3.6
Max RIPE Region AS path length visible: 26
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 514406912
Equivalent to 30 /8s, 169 /16s and 58 /24s
Percentage of available RIPE address space announced: 82.9

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: 40941
Total LACNIC prefixes after maximum aggregation: 8121
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 41250
Unique aggregates announced from the LACNIC address blocks: 20470
LACNIC Region origin ASes present in the Internet Routing Table: 1582
LACNIC Prefixes per ASN: 26.07
LACNIC Region origin ASes announcing only one prefix: 444
LACNIC Region transit ASes present in the Internet Routing Table: 294
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: 101309440
Equivalent to 6 /8s, 9 /16s and 220 /24s
Percentage of available LACNIC address space announced: 67.1

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: 9299
Total AfriNIC prefixes after maximum aggregation: 2177
AfriNIC Deaggregation factor: 4.27
Prefixes being announced from the AfriNIC address blocks: 7371
Unique aggregates announced from the AfriNIC address blocks: 2188
AfriNIC Region origin ASes present in the Internet Routing Table: 536
AfriNIC Prefixes per ASN: 13.75
AfriNIC Region origin ASes announcing only one prefix: 163
AfriNIC Region transit ASes present in the Internet Routing Table: 119
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: 31706112
Equivalent to 1 /8s, 227 /16s and 204 /24s
Percentage of available AfriNIC address space announced: 47.2

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 1979 11104 729 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1667 301 88 TPG Internet Pty Ltd
4755 1552 384 152 TATA Communications formerly
9829 1297 1085 28 National Internet Backbone
9583 1161 87 499 Sify Limited
7552 1127 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 63 BHARTI Airtel Ltd.
4808 949 1938 283 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 3412 3807 193 BellSouth.net Inc.
7029 3375 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
1785 1908 680 130 PaeTec Communications, Inc.
20115 1639 1566 616 Charter Communications
22773 1608 2911 121 Cox Communications Inc.
4323 1562 1056 379 tw telecom holdings, inc.
30036 1407 261 755 Mediacom Communications Corp
7018 1225 10064 824 AT&T Services, Inc.
11492 1187 216 361 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 1478 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 698 188 172 BILISIM TELEKOM
12479 688 678 70 France Telecom Espana SA
31148 684 37 9 FreeNet ISP
6830 654 2215 425 UPC Broadband
20940 645 215 512 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 503 362 71 Bezeq International
3320 486 8442 400 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 1920 340 201 Types of queries are: POCs, o
28573 1889 1171 59 Types of queries are: POCs, o
6503 1530 418 67 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1337 3035 335 Uninet S.A. de C.V.
26615 902 760 32 Tim Celular S.A.
27947 664 73 94 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
3816 588 247 89 Types of queries are: POCs, o
22047 582 326 15 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 1369 958 13 TEDATA
24863 843 274 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 205 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 3412 3807 193 BellSouth.net Inc.
7029 3375 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
4766 1979 11104 729 Korea Telecom (KIX)
10620 1920 340 201 Types of queries are: POCs, o
1785 1908 680 130 PaeTec Communications, Inc.
28573 1889 1171 59 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1667 301 88 TPG Internet Pty Ltd
20115 1639 1566 616 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 3375 3204 Windstream Communications Inc
18566 2094 1913 Covad Communications Co.
28573 1889 1830 Types of queries are: POCs, o
1785 1908 1778 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1920 1719 Types of queries are: POCs, o
7545 1667 1579 TPG Internet Pty Ltd
22773 1608 1487 Cox Communications Inc.
6503 1530 1463 Axtel, S.A.B. de C.V.
8402 1478 1462 Corbina telecom

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
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 /14:830 /15:1499 /16:12249 /17:6265 /18:10518
/19:20661 /20:29344 /21:30512 /22:40011 /23:38081 /24:212827
/25:11 /26:21 /27:19 /28:152 /29:146 /30:77
/31:0 /32:134

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

ASN No of nets Total ann. Description
7029 3016 3375 Windstream Communications Inc
6389 2131 3412 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1734 1920 Types of queries are: POCs, o
8402 1456 1478 Corbina telecom
30036 1348 1407 Mediacom Communications Corp
6503 1283 1530 Axtel, S.A.B. de C.V.
8452 1170 1369 TEDATA
11492 1150 1187 CABLE ONE, INC.
1785 1065 1908 PaeTec Communications, Inc.

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

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

1:547 2:545 4:13 5:35 6:3 8:419
12:1971 13:1 14:610 15:12 16:3 17:5
20:23 23:168 24:1769 27:1313 31:1045 32:52
33:2 34:2 36:8 37:626 38:803 40:119
41:3198 42:137 44:3 46:1408 47:3 49:449
50:547 52:13 54:12 55:9 56:3 57:27
58:913 59:489 60:248 61:1112 62:981 63:2004
64:4229 65:2245 66:4464 67:2008 68:1159 69:3188
70:932 71:494 72:1824 74:2595 75:494 76:328
77:938 78:967 79:485 80:1217 81:938 82:667
83:543 84:491 85:1204 86:447 87:910 88:334
89:1701 90:287 91:4843 92:545 93:1334 94:1518
95:1142 96:357 97:313 98:861 99:35 100:7
101:189 103:1083 106:104 107:185 108:291 109:1340
110:737 111:920 112:398 113:587 114:621 115:835
116:914 117:705 118:903 119:1202 120:350 121:676
122:1624 123:1098 124:1312 125:1251 128:515 129:190
130:240 131:628 132:280 133:22 134:238 135:59
136:207 137:184 138:359 139:184 140:469 141:235
142:396 143:548 144:533 145:71 146:500 147:282
148:751 149:305 150:185 151:177 152:466 153:172
154:11 155:418 156:219 157:336 158:184 159:483
160:338 161:241 162:344 163:180 164:590 165:399
166:592 167:468 168:859 169:125 170:870 171:132
172:4 173:1750 174:579 175:422 176:519 177:808
178:1381 180:1203 181:88 182:984 183:226 184:496
185:1 186:2281 187:1091 188:1276 189:1809 190:5544
192:5964 193:5572 194:4517 195:3414 196:1189 197:148
198:3613 199:4611 200:5736 201:1937 202:8337 203:8497
204:4259 205:2528 206:2673 207:2729 208:4052 209:3601
210:2677 211:1511 212:2030 213:1938 214:840 215:101
216:5078 217:1542 218:537 219:308 220:1235 221:545
222:296 223:346

End of report
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