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, May 25, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sat 26 May, 2012

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

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

BGP routing table entries examined: 404323
Prefixes after maximum aggregation: 172168
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 200167
Total ASes present in the Internet Routing Table: 38572
Prefixes per ASN: 10.48
Origin-only ASes present in the Internet Routing Table: 33267
Origin ASes announcing only one prefix: 15676
Transit ASes present in the Internet Routing Table: 5305
Transit-only ASes present in the Internet Routing Table: 114
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: 1182
Unregistered ASNs in the Routing Table: 227
Number of 32-bit ASNs allocated by the RIRs: 2738
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6035
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 134
Number of addresses announced to Internet: 2574161408
Equivalent to 153 /8s, 110 /16s and 150 /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: 92.6
Total number of prefixes smaller than registry allocations: 170866

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

Prefixes being announced by APNIC Region ASes: 94692
Total APNIC prefixes after maximum aggregation: 30985
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 92167
Unique aggregates announced from the APNIC address blocks: 40118
APNIC Region origin ASes present in the Internet Routing Table: 4648
APNIC Prefixes per ASN: 19.83
APNIC Region origin ASes announcing only one prefix: 1268
APNIC Region transit ASes present in the Internet Routing Table: 708
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: 645537024
Equivalent to 38 /8s, 122 /16s and 29 /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: 150024
Total ARIN prefixes after maximum aggregation: 76369
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120807
Unique aggregates announced from the ARIN address blocks: 51037
ARIN Region origin ASes present in the Internet Routing Table: 15073
ARIN Prefixes per ASN: 8.01
ARIN Region origin ASes announcing only one prefix: 5740
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: 812275712
Equivalent to 48 /8s, 106 /16s and 88 /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: 102481
Total RIPE prefixes after maximum aggregation: 54440
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94646
Unique aggregates announced from the RIPE address blocks: 59278
RIPE Region origin ASes present in the Internet Routing Table: 16573
RIPE Prefixes per ASN: 5.71
RIPE Region origin ASes announcing only one prefix: 8059
RIPE Region transit ASes present in the Internet Routing Table: 2596
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: 514352896
Equivalent to 30 /8s, 168 /16s and 103 /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: 40954
Total LACNIC prefixes after maximum aggregation: 8132
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 41232
Unique aggregates announced from the LACNIC address blocks: 20450
LACNIC Region origin ASes present in the Internet Routing Table: 1586
LACNIC Prefixes per ASN: 26.00
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 299
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: 101339136
Equivalent to 6 /8s, 10 /16s and 80 /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: 9289
Total AfriNIC prefixes after maximum aggregation: 2173
AfriNIC Deaggregation factor: 4.27
Prefixes being announced from the AfriNIC address blocks: 7360
Unique aggregates announced from the AfriNIC address blocks: 2185
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.63
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 120
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: 31743232
Equivalent to 1 /8s, 228 /16s and 93 /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 1979 11105 730 Korea Telecom (KIX)
17974 1830 530 80 PT Telekomunikasi Indonesia
7545 1666 301 87 TPG Internet Pty Ltd
4755 1553 384 152 TATA Communications formerly
9829 1296 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 965 291 64 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 3413 3807 193 BellSouth.net Inc.
7029 3373 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
1785 1907 680 130 PaeTec Communications, Inc.
20115 1639 1566 616 Charter Communications
22773 1607 2911 121 Cox Communications Inc.
4323 1562 1056 379 tw telecom holdings, inc.
30036 1401 260 760 Mediacom Communications Corp
7018 1230 10064 827 AT&T Services, Inc.
7011 1188 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 1626 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 697 188 172 BILISIM TELEKOM
12479 688 678 70 France Telecom Espana SA
31148 684 37 9 FreeNet ISP
6830 654 2215 425 UPC Broadband
20940 645 215 511 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 503 362 71 Bezeq International
3320 489 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 1917 340 202 Types of queries are: POCs, o
28573 1891 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 1338 3035 333 Uninet S.A. de C.V.
26615 902 760 32 Tim Celular S.A.
27947 665 73 95 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 1367 957 12 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 3413 3807 193 BellSouth.net Inc.
7029 3373 1016 171 Windstream Communications Inc
18566 2094 382 181 Covad Communications Co.
4766 1979 11105 730 Korea Telecom (KIX)
10620 1917 340 202 Types of queries are: POCs, o
1785 1907 680 130 PaeTec Communications, Inc.
28573 1891 1171 59 Types of queries are: POCs, o
17974 1830 530 80 PT Telekomunikasi Indonesia
7545 1666 301 87 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 3373 3202 Windstream Communications Inc
18566 2094 1913 Covad Communications Co.
28573 1891 1832 Types of queries are: POCs, o
1785 1907 1777 PaeTec Communications, Inc.
17974 1830 1750 PT Telekomunikasi Indonesia
10620 1917 1715 Types of queries are: POCs, o
8402 1626 1610 Corbina telecom
7545 1666 1579 TPG Internet Pty Ltd
22773 1607 1486 Cox Communications Inc.
6503 1530 1463 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
58202 UNALLOCATED 5.45.32.0/23 15830 TELECITY London
58202 UNALLOCATED 5.45.32.0/22 15830 TELECITY London
58202 UNALLOCATED 5.45.32.0/21 15830 TELECITY London
58202 UNALLOCATED 5.45.32.0/20 15830 TELECITY London
58202 UNALLOCATED 5.45.34.0/23 15830 TELECITY London
58202 UNALLOCATED 5.45.36.0/23 15830 TELECITY London
58202 UNALLOCATED 5.45.36.0/22 15830 TELECITY London
58202 UNALLOCATED 5.45.38.0/23 15830 TELECITY London
58202 UNALLOCATED 5.45.40.0/23 15830 TELECITY London
58202 UNALLOCATED 5.45.40.0/22 15830 TELECITY London

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
5.44.40.0/21 23456 32-bit ASN transition
5.44.96.0/22 31342 Clanotopia IT-Service Ltd.
5.44.100.0/22 31342 Clanotopia IT-Service Ltd.
5.44.104.0/22 29066 velia.net Internetdienste Gmb
5.44.184.0/21 23456 32-bit ASN transition
5.44.216.0/21 51109 CAMELHOST SIA
5.45.32.0/23 58202 >>UNKNOWN<<
5.45.32.0/22 58202 >>UNKNOWN<<
5.45.32.0/21 58202 >>UNKNOWN<<
5.45.32.0/20 58202 >>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 /16:12245 /17:6265 /18:10511
/19:20657 /20:29335 /21:30505 /22:39950 /23:38054 /24:213066
/25:11 /26:21 /27:19 /28:152 /29:146 /30:77
/31:0 /32:141

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

ASN No of nets Total ann. Description
7029 3014 3373 Windstream Communications Inc
6389 2132 3413 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1734 1917 Types of queries are: POCs, o
8402 1604 1626 Corbina telecom
30036 1342 1401 Mediacom Communications Corp
6503 1283 1530 Axtel, S.A.B. de C.V.
8452 1169 1367 TEDATA
11492 1149 1186 CABLE ONE, INC.
7011 1073 1188 Frontier Communications of Am

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

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

1:545 2:698 4:13 5:35 6:3 8:420
12:1972 13:1 14:608 15:12 16:3 17:5
20:23 23:171 24:1766 27:1314 31:1046 32:52
33:2 34:2 36:8 37:623 38:803 40:121
41:3190 42:137 44:3 46:1417 47:3 49:449
50:542 52:13 54:12 55:9 56:3 57:27
58:912 59:490 60:248 61:1111 62:1002 63:2030
64:4230 65:2246 66:4469 67:2007 68:1159 69:3192
70:932 71:494 72:1822 74:2598 75:493 76:328
77:943 78:982 79:492 80:1221 81:936 82:667
83:542 84:491 85:1208 86:445 87:910 88:340
89:1716 90:289 91:4852 92:548 93:1333 94:1516
95:1139 96:363 97:313 98:860 99:35 100:7
101:188 103:1081 106:104 107:185 108:290 109:1339
110:738 111:918 112:398 113:584 114:621 115:830
116:912 117:701 118:905 119:1199 120:350 121:676
122:1623 123:1100 124:1313 125:1252 128:520 129:190
130:239 131:619 132:281 133:22 134:238 135:59
136:212 137:184 138:359 139:184 140:469 141:242
142:398 143:549 144:527 145:69 146:501 147:286
148:753 149:305 150:182 151:177 152:466 153:172
154:11 155:418 156:218 157:337 158:184 159:483
160:339 161:241 162:344 163:180 164:597 165:400
166:592 167:466 168:858 169:125 170:875 171:131
172:4 173:1745 174:578 175:422 176:527 177:798
178:1381 180:1202 181:85 182:983 183:226 184:497
185:1 186:2284 187:1095 188:1276 189:1800 190:5516
192:5960 193:5568 194:4521 195:3407 196:1187 197:148
198:3608 199:4605 200:5750 201:1936 202:8321 203:8514
204:4261 205:2529 206:2673 207:2730 208:4053 209:3603
210:2690 211:1509 212:2028 213:1937 214:837 215:101
216:5079 217:1550 218:538 219:307 220:1236 221:545
222:296 223:348

End of report
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