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 11, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sat 12 May, 2012

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

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

BGP routing table entries examined: 400621
Prefixes after maximum aggregation: 171458
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199090
Total ASes present in the Internet Routing Table: 38490
Prefixes per ASN: 10.41
Origin-only ASes present in the Internet Routing Table: 33184
Origin ASes announcing only one prefix: 15678
Transit ASes present in the Internet Routing Table: 5306
Transit-only ASes present in the Internet Routing Table: 115
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: 1160
Unregistered ASNs in the Routing Table: 222
Number of 32-bit ASNs allocated by the RIRs: 2687
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5821
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 110
Number of addresses announced to Internet: 2569837056
Equivalent to 153 /8s, 44 /16s and 154 /24s
Percentage of available address space announced: 69.3
Percentage of allocated address space announced: 69.4
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: 169659

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

Prefixes being announced by APNIC Region ASes: 94519
Total APNIC prefixes after maximum aggregation: 30941
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91999
Unique aggregates announced from the APNIC address blocks: 39964
APNIC Region origin ASes present in the Internet Routing Table: 4636
APNIC Prefixes per ASN: 19.84
APNIC Region origin ASes announcing only one prefix: 1259
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: 644420352
Equivalent to 38 /8s, 105 /16s and 19 /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: 149414
Total ARIN prefixes after maximum aggregation: 76056
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120576
Unique aggregates announced from the ARIN address blocks: 50753
ARIN Region origin ASes present in the Internet Routing Table: 15038
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5737
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: 812014848
Equivalent to 48 /8s, 102 /16s and 93 /24s
Percentage of available ARIN address space announced: 64.7

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: 100467
Total RIPE prefixes after maximum aggregation: 54100
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 92713
Unique aggregates announced from the RIPE address blocks: 58703
RIPE Region origin ASes present in the Internet Routing Table: 16549
RIPE Prefixes per ASN: 5.60
RIPE Region origin ASes announcing only one prefix: 8069
RIPE Region transit ASes present in the Internet Routing Table: 2606
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: 512875776
Equivalent to 30 /8s, 145 /16s and 221 /24s
Percentage of available RIPE address space announced: 82.6

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: 40641
Total LACNIC prefixes after maximum aggregation: 8154
LACNIC Deaggregation factor: 4.98
Prefixes being announced from the LACNIC address blocks: 40791
Unique aggregates announced from the LACNIC address blocks: 20508
LACNIC Region origin ASes present in the Internet Routing Table: 1585
LACNIC Prefixes per ASN: 25.74
LACNIC Region origin ASes announcing only one prefix: 447
LACNIC Region transit ASes present in the Internet Routing Table: 289
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: 100172544
Equivalent to 5 /8s, 248 /16s and 131 /24s
Percentage of available LACNIC address space announced: 66.3

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: 8930
Total AfriNIC prefixes after maximum aggregation: 2141
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6995
Unique aggregates announced from the AfriNIC address blocks: 2200
AfriNIC Region origin ASes present in the Internet Routing Table: 530
AfriNIC Prefixes per ASN: 13.20
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: 3.5
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: 31771904
Equivalent to 1 /8s, 228 /16s and 205 /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 1955 11106 708 Korea Telecom (KIX)
17974 1779 510 73 PT Telekomunikasi Indonesia
7545 1658 301 85 TPG Internet Pty Ltd
4755 1577 386 159 TATA Communications formerly
9829 1272 1069 30 National Internet Backbone
9583 1156 86 500 Sify Limited
7552 1130 1062 11 Vietel Corporation
24560 1025 382 175 Bharti Airtel Ltd., Telemedia
9498 965 291 64 BHARTI Airtel Ltd.
4808 951 1938 284 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 3416 3807 194 BellSouth.net Inc.
7029 3412 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1902 680 130 PaeTec Communications, Inc.
20115 1638 1566 620 Charter Communications
4323 1601 1060 382 tw telecom holdings, inc.
22773 1596 2911 115 Cox Communications Inc.
30036 1406 262 751 Mediacom Communications Corp
7018 1258 10071 827 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 1618 544 16 Corbina telecom
34984 693 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 675 671 69 France Telecom Espana SA
6830 656 2215 426 UPC Broadband
20940 644 215 510 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 503 360 80 Bezeq International
3320 484 8442 400 Deutsche Telekom AG
3292 472 2108 406 TDC Data Networks

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 1869 334 175 Types of queries are: POCs, o
28573 1848 1137 58 Types of queries are: POCs, o
6503 1517 418 68 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1335 2985 335 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 670 74 98 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 578 244 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 958 13 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 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 160 666 86 MTN Network Solutions
29571 158 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 3416 3807 194 BellSouth.net Inc.
7029 3412 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1955 11106 708 Korea Telecom (KIX)
1785 1902 680 130 PaeTec Communications, Inc.
10620 1869 334 175 Types of queries are: POCs, o
28573 1848 1137 58 Types of queries are: POCs, o
17974 1779 510 73 PT Telekomunikasi Indonesia
7545 1658 301 85 TPG Internet Pty Ltd
20115 1638 1566 620 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 3412 3241 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
28573 1848 1790 Types of queries are: POCs, o
1785 1902 1772 PaeTec Communications, Inc.
17974 1779 1706 PT Telekomunikasi Indonesia
10620 1869 1694 Types of queries are: POCs, o
8402 1618 1602 Corbina telecom
7545 1658 1573 TPG Internet Pty Ltd
22773 1596 1481 Cox Communications Inc.
6503 1517 1449 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
5.32.168.0/21 15836 ARAX Autonomous System
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

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 /14:829 /15:1494 /16:12190 /17:6215 /18:10478
/19:20684 /20:29157 /21:30184 /22:39444 /23:37816 /24:210718
/25:11 /26:21 /27:20 /28:153 /29:149 /30:76
/31:0 /32:143

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

ASN No of nets Total ann. Description
7029 3051 3412 Windstream Communications Inc
6389 2134 3416 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1715 1869 Types of queries are: POCs, o
8402 1596 1618 Corbina telecom
30036 1347 1406 Mediacom Communications Corp
6503 1274 1517 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1107 1306 TEDATA
7011 1069 1184 Frontier Communications of Am

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

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

1:537 2:642 4:14 5:2 6:3 8:410
12:1961 13:1 14:602 15:12 16:3 17:5
20:23 23:164 24:1763 27:1293 31:971 32:52
33:2 34:2 36:8 37:446 38:803 40:118
41:3111 42:136 44:3 46:1420 47:3 49:398
50:541 52:13 54:10 55:10 56:3 57:27
58:913 59:504 60:249 61:1167 62:984 63:2050
64:4169 65:2239 66:4457 67:2019 68:1165 69:3204
70:904 71:484 72:1819 74:2592 75:492 76:319
77:937 78:972 79:489 80:1214 81:906 82:672
83:553 84:485 85:1212 86:445 87:921 88:334
89:1681 90:292 91:4807 92:539 93:1469 94:1519
95:897 96:363 97:316 98:873 99:35 100:7
101:181 103:1034 106:103 107:187 108:266 109:1327
110:756 111:910 112:396 113:586 114:624 115:889
116:914 117:696 118:910 119:1200 120:346 121:786
122:1628 123:1095 124:1314 125:1243 128:521 129:188
130:245 131:626 132:173 133:22 134:237 135:62
136:213 137:175 138:334 139:181 140:466 141:241
142:394 143:427 144:523 145:70 146:491 147:280
148:749 149:305 150:150 151:176 152:464 153:172
154:11 155:417 156:216 157:336 158:179 159:475
160:337 161:236 162:343 163:181 164:584 165:389
166:571 167:467 168:854 169:125 170:865 171:131
172:2 173:1737 174:582 175:424 176:697 177:718
178:1363 180:1195 181:82 182:942 183:290 184:487
185:1 186:2268 187:1080 188:1264 189:1786 190:5546
192:5958 193:5288 194:3805 195:3210 196:1256 197:135
198:3597 199:4561 200:5750 201:1931 202:8304 203:8497
204:4256 205:2506 206:2673 207:2728 208:4073 209:3603
210:2677 211:1465 212:2040 213:1938 214:844 215:98
216:5090 217:1546 218:530 219:334 220:1227 221:540
222:293 223:328

End of report
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