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 20, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 21 May, 2012

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

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

BGP routing table entries examined: 402612
Prefixes after maximum aggregation: 171788
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199827
Total ASes present in the Internet Routing Table: 38528
Prefixes per ASN: 10.45
Origin-only ASes present in the Internet Routing Table: 33234
Origin ASes announcing only one prefix: 15667
Transit ASes present in the Internet Routing Table: 5294
Transit-only ASes present in the Internet Routing Table: 111
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: 1158
Unregistered ASNs in the Routing Table: 228
Number of 32-bit ASNs allocated by the RIRs: 2724
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5936
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2571787776
Equivalent to 153 /8s, 74 /16s and 94 /24s
Percentage of available address space announced: 69.4
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: 92.7
Total number of prefixes smaller than registry allocations: 170576

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

Prefixes being announced by APNIC Region ASes: 94434
Total APNIC prefixes after maximum aggregation: 30971
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91927
Unique aggregates announced from the APNIC address blocks: 40012
APNIC Region origin ASes present in the Internet Routing Table: 4645
APNIC Prefixes per ASN: 19.79
APNIC Region origin ASes announcing only one prefix: 1263
APNIC Region transit ASes present in the Internet Routing Table: 707
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: 644734976
Equivalent to 38 /8s, 109 /16s and 224 /24s
Percentage of available APNIC address space announced: 81.8

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: 149961
Total ARIN prefixes after maximum aggregation: 76170
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120808
Unique aggregates announced from the ARIN address blocks: 51014
ARIN Region origin ASes present in the Internet Routing Table: 15060
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5745
ARIN Region transit ASes present in the Internet Routing Table: 1518
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: 812262400
Equivalent to 48 /8s, 106 /16s and 36 /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: 101509
Total RIPE prefixes after maximum aggregation: 54272
RIPE Deaggregation factor: 1.87
Prefixes being announced from the RIPE address blocks: 93690
Unique aggregates announced from the RIPE address blocks: 59115
RIPE Region origin ASes present in the Internet Routing Table: 16558
RIPE Prefixes per ASN: 5.66
RIPE Region origin ASes announcing only one prefix: 8053
RIPE Region transit ASes present in the Internet Routing Table: 2596
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: 513480960
Equivalent to 30 /8s, 155 /16s and 25 /24s
Percentage of available RIPE address space announced: 82.7

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: 40856
Total LACNIC prefixes after maximum aggregation: 8158
LACNIC Deaggregation factor: 5.01
Prefixes being announced from the LACNIC address blocks: 41062
Unique aggregates announced from the LACNIC address blocks: 20454
LACNIC Region origin ASes present in the Internet Routing Table: 1584
LACNIC Prefixes per ASN: 25.92
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 295
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: 101114368
Equivalent to 6 /8s, 6 /16s and 226 /24s
Percentage of available LACNIC address space announced: 67.0

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: 9090
Total AfriNIC prefixes after maximum aggregation: 2153
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 7151
Unique aggregates announced from the AfriNIC address blocks: 2206
AfriNIC Region origin ASes present in the Internet Routing Table: 534
AfriNIC Prefixes per ASN: 13.39
AfriNIC Region origin ASes announcing only one prefix: 164
AfriNIC Region transit ASes present in the Internet Routing Table: 117
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: 31794176
Equivalent to 1 /8s, 229 /16s and 36 /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 1975 11105 728 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1658 301 85 TPG Internet Pty Ltd
4755 1553 384 152 TATA Communications formerly
9829 1289 1085 28 National Internet Backbone
9583 1158 87 498 Sify Limited
7552 1129 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 64 BHARTI Airtel Ltd.
18101 948 131 155 Reliance Infocom Ltd Internet

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 194 BellSouth.net Inc.
7029 3401 1016 170 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
1785 1904 680 130 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1606 2911 121 Cox Communications Inc.
4323 1578 1058 381 tw telecom holdings, inc.
30036 1416 262 753 Mediacom Communications Corp
7018 1233 10063 829 AT&T Services, Inc.
7011 1187 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 1589 544 16 Corbina telecom
34984 696 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 677 671 67 France Telecom Espana SA
2118 658 97 14 EUnet/RELCOM Autonomous Syste
6830 655 2215 426 UPC Broadband
20940 643 215 511 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 492 360 80 Bezeq International
3320 485 8442 401 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 1902 337 202 Types of queries are: POCs, o
28573 1845 1153 59 Types of queries are: POCs, o
6503 1518 418 67 Axtel, S.A.B. de C.V.
7303 1433 901 191 Telecom Argentina S.A.
8151 1336 3010 338 Uninet S.A. de C.V.
26615 902 760 32 Tim Celular S.A.
27947 666 73 95 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 581 244 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 1306 957 12 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
3741 262 905 223 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 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 3415 3807 194 BellSouth.net Inc.
7029 3401 1016 170 Windstream Communications Inc
18566 2096 382 178 Covad Communications Co.
4766 1975 11105 728 Korea Telecom (KIX)
1785 1904 680 130 PaeTec Communications, Inc.
10620 1902 337 202 Types of queries are: POCs, o
28573 1845 1153 59 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1658 301 85 TPG Internet Pty Ltd
20115 1637 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 2096 1918 Covad Communications Co.
28573 1845 1786 Types of queries are: POCs, o
1785 1904 1774 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1902 1700 Types of queries are: POCs, o
7545 1658 1573 TPG Internet Pty Ltd
8402 1589 1573 Corbina telecom
22773 1606 1485 Cox Communications Inc.
6503 1518 1451 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.
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 /15:1492 /16:12200 /17:6235 /18:10506
/19:20717 /20:29288 /21:30326 /22:39679 /23:37996 /24:211943
/25:11 /26:21 /27:20 /28:151 /29:148 /30:74
/31:0 /32:136

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

ASN No of nets Total ann. Description
7029 3040 3401 Windstream Communications Inc
6389 2133 3415 BellSouth.net Inc.
18566 2045 2096 Covad Communications Co.
10620 1726 1902 Types of queries are: POCs, o
8402 1567 1589 Corbina telecom
30036 1357 1416 Mediacom Communications Corp
6503 1275 1518 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1108 1306 TEDATA
7011 1072 1187 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 2:657 4:13 5:32 6:3 8:414
12:1970 13:1 14:601 15:12 16:3 17:5
20:23 23:168 24:1767 27:1288 31:1043 32:52
33:2 34:2 36:8 37:479 38:804 40:119
41:3169 42:136 44:3 46:1422 47:3 49:400
50:544 52:13 54:11 55:9 56:3 57:28
58:910 59:476 60:247 61:1115 62:994 63:2044
64:4172 65:2247 66:4474 67:2011 68:1163 69:3199
70:904 71:489 72:1822 74:2594 75:492 76:327
77:939 78:977 79:485 80:1211 81:909 82:669
83:547 84:486 85:1209 86:436 87:909 88:335
89:1710 90:290 91:4839 92:546 93:1326 94:1520
95:1145 96:362 97:313 98:890 99:35 100:7
101:186 103:1063 106:104 107:185 108:279 109:1334
110:750 111:908 112:399 113:585 114:616 115:827
116:910 117:696 118:905 119:1196 120:348 121:676
122:1617 123:1100 124:1319 125:1249 128:518 129:189
130:244 131:621 132:171 133:22 134:239 135:62
136:212 137:239 138:352 139:182 140:467 141:242
142:395 143:547 144:510 145:70 146:499 147:295
148:746 149:295 150:184 151:177 152:467 153:172
154:11 155:418 156:220 157:337 158:185 159:479
160:339 161:243 162:344 163:180 164:598 165:402
166:570 167:468 168:859 169:125 170:873 171:131
172:4 173:1751 174:586 175:423 176:586 177:749
178:1376 180:1201 181:84 182:978 183:296 184:496
185:1 186:2301 187:1067 188:1274 189:1796 190:5539
192:5954 193:5448 194:4179 195:3213 196:1267 197:140
198:3607 199:4591 200:5777 201:1927 202:8319 203:8511
204:4261 205:2535 206:2683 207:2728 208:4055 209:3610
210:2687 211:1493 212:2036 213:1945 214:840 215:102
216:5081 217:1538 218:530 219:307 220:1234 221:541
222:295 223:327

End of report
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