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.

Monday, July 30, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Tue 31 Jul, 2012

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

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

BGP routing table entries examined: 411984
Prefixes after maximum aggregation: 174573
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 204693
Total ASes present in the Internet Routing Table: 38832
Prefixes per ASN: 10.61
Origin-only ASes present in the Internet Routing Table: 33448
Origin ASes announcing only one prefix: 15732
Transit ASes present in the Internet Routing Table: 5384
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: 24
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 1054
Unregistered ASNs in the Routing Table: 190
Number of 32-bit ASNs allocated by the RIRs: 3051
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6834
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 173
Number of addresses announced to Internet: 2591286272
Equivalent to 154 /8s, 115 /16s and 228 /24s
Percentage of available address space announced: 69.9
Percentage of allocated address space announced: 70.0
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.1
Total number of prefixes smaller than registry allocations: 142691

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

Prefixes being announced by APNIC Region ASes: 96262
Total APNIC prefixes after maximum aggregation: 31250
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 97359
Unique aggregates announced from the APNIC address blocks: 42270
APNIC Region origin ASes present in the Internet Routing Table: 4681
APNIC Prefixes per ASN: 20.80
APNIC Region origin ASes announcing only one prefix: 1272
APNIC Region transit ASes present in the Internet Routing Table: 726
Average APNIC Region AS path length visible: 4.1
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: 703716096
Equivalent to 41 /8s, 241 /16s and 219 /24s
Percentage of available APNIC address space announced: 82.2

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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, 150/8, 153/8,
163/8, 171/8, 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: 151826
Total ARIN prefixes after maximum aggregation: 77308
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 152847
Unique aggregates announced from the ARIN address blocks: 68810
ARIN Region origin ASes present in the Internet Routing Table: 15150
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 5765
ARIN Region transit ASes present in the Internet Routing Table: 1517
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 18
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 1072478720
Equivalent to 63 /8s, 236 /16s and 186 /24s
Percentage of available ARIN address space announced: 56.7

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, 128/8,
129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8,
137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8,
146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8,
157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8,
165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8,
173/8, 174/8, 184/8, 192/8, 198/8, 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: 104632
Total RIPE prefixes after maximum aggregation: 55536
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 106834
Unique aggregates announced from the RIPE address blocks: 68114
RIPE Region origin ASes present in the Internet Routing Table: 16704
RIPE Prefixes per ASN: 6.40
RIPE Region origin ASes announcing only one prefix: 8103
RIPE Region transit ASes present in the Internet Routing Table: 2647
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 23
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 638139904
Equivalent to 38 /8s, 9 /16s and 62 /24s
Percentage of available RIPE address space announced: 92.8

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
59392-61439, 196608-199679
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,
141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 42222
Total LACNIC prefixes after maximum aggregation: 8256
LACNIC Deaggregation factor: 5.11
Prefixes being announced from the LACNIC address blocks: 44869
Unique aggregates announced from the LACNIC address blocks: 21943
LACNIC Region origin ASes present in the Internet Routing Table: 1601
LACNIC Prefixes per ASN: 28.03
LACNIC Region origin ASes announcing only one prefix: 425
LACNIC Region transit ASes present in the Internet Routing Table: 307
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 112997632
Equivalent to 6 /8s, 188 /16s and 53 /24s
Percentage of available LACNIC address space announced: 67.4

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,
191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9475
Total AfriNIC prefixes after maximum aggregation: 2169
AfriNIC Deaggregation factor: 4.37
Prefixes being announced from the AfriNIC address blocks: 9901
Unique aggregates announced from the AfriNIC address blocks: 3406
AfriNIC Region origin ASes present in the Internet Routing Table: 549
AfriNIC Prefixes per ASN: 18.03
AfriNIC Region origin ASes announcing only one prefix: 167
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: 41355008
Equivalent to 2 /8s, 119 /16s and 7 /24s
Percentage of available AfriNIC address space announced: 41.1

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
17974 2267 569 90 PT Telekomunikasi Indonesia
4766 2024 11112 784 Korea Telecom (KIX)
7545 1683 301 87 TPG Internet Pty Ltd
4755 1580 385 154 TATA Communications formerly
9829 1308 1084 31 National Internet Backbone
9583 1160 87 508 Sify Limited
7552 1110 1062 11 Vietel Corporation
24560 1037 385 165 Bharti Airtel Ltd., Telemedia
9498 992 294 73 BHARTI Airtel Ltd.
4808 967 1943 291 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
7029 3443 986 155 Windstream Communications Inc
6389 3383 3773 192 BellSouth.net Inc.
18566 2089 382 181 Covad Communications Co.
1785 1940 681 131 PaeTec Communications, Inc.
22773 1697 2914 125 Cox Communications Inc.
20115 1647 1570 611 Charter Communications
4323 1570 1043 381 tw telecom holdings, inc.
30036 1407 275 790 Mediacom Communications Corp
7018 1260 10072 829 AT&T Services, Inc.
7011 1190 316 696 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 1571 544 16 Corbina telecom
12479 808 749 92 France Telecom Espana SA
34984 735 189 177 BILISIM TELEKOM
6830 716 2310 447 UPC Broadband
31148 706 37 9 FreeNet ISP
20940 694 229 555 Akamai Technologies European
2118 632 97 14 EUnet/RELCOM Autonomous Syste
13188 619 100 9 Ukraine
8551 600 364 61 Bezeq International
9116 539 326 31 Goldenlines main autonomous s

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
28573 2040 1226 58 Types of queries are: POCs, o
10620 2033 349 211 Types of queries are: POCs, o
6503 1519 419 69 Axtel, S.A.B. de C.V.
7303 1458 934 196 Telecom Argentina S.A.
8151 1338 3053 345 Uninet S.A. de C.V.
6458 881 81 15 Telgua
27947 695 75 90 Telconet S.A
11172 645 107 75 Alestra, S. de R.L. de C.V.
3816 598 249 86 Types of queries are: POCs, o
22047 583 326 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 1009 958 13 TEDATA
24863 863 274 32 LINKdotNET AS number
6713 509 650 19 Itissalat Al-MAGHRIB
36998 483 48 3 MOBITEL
24835 284 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
29975 191 667 21 Vodacom
15706 182 32 6 Sudatel Internet Exchange Aut
29571 160 15 15 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
7029 3443 986 155 Windstream Communications Inc
6389 3383 3773 192 BellSouth.net Inc.
17974 2267 569 90 PT Telekomunikasi Indonesia
18566 2089 382 181 Covad Communications Co.
28573 2040 1226 58 Types of queries are: POCs, o
10620 2033 349 211 Types of queries are: POCs, o
4766 2024 11112 784 Korea Telecom (KIX)
1785 1940 681 131 PaeTec Communications, Inc.
22773 1697 2914 125 Cox Communications Inc.
7545 1683 301 87 TPG Internet Pty Ltd

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
6389 3383 3191 BellSouth.net Inc.
17974 2267 2177 PT Telekomunikasi Indonesia
28573 2040 1982 Types of queries are: POCs, o
18566 2089 1908 Covad Communications Co.
10620 2033 1822 Types of queries are: POCs, o
1785 1940 1809 PaeTec Communications, Inc.
7545 1683 1596 TPG Internet Pty Ltd
22773 1697 1572 Cox Communications Inc.
8402 1571 1555 Corbina telecom
6503 1519 1450 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
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.68.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.71.0/24 35567 DASTO semtel d.o.o.
59458 UNALLOCATED 5.149.96.0/21 50597 ScopeSky Communicati
59458 UNALLOCATED 5.149.104.0/22 50597 ScopeSky Communicati
59473 UNALLOCATED 5.149.152.0/22 44843 AmsterdamTelecom Ltd
59473 UNALLOCATED 5.149.156.0/23 44843 AmsterdamTelecom Ltd
65333 PRIVATE 10.0.0.0/8 0 *

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
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
5.172.64.0/18 50809 Digitel Italia S.p.A.
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 /10:29 /11:82 /12:236
/13:473 /14:847 /15:1525 /16:12269 /17:6370 /18:10666
/19:20811 /20:29855 /21:31406 /22:40930 /23:39234 /24:216640
/25:11 /26:22 /27:19 /28:150 /29:154 /30:84
/31:0 /32:139

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

ASN No of nets Total ann. Description
7029 2802 3443 Windstream Communications Inc
18566 2039 2089 Covad Communications Co.
6389 1864 3383 BellSouth.net Inc.
30036 1342 1407 Mediacom Communications Corp
8402 1271 1571 Corbina telecom
11492 1145 1182 CABLE ONE, INC.
22773 1121 1697 Cox Communications Inc.
1785 1049 1940 PaeTec Communications, Inc.
6503 1047 1519 Axtel, S.A.B. de C.V.
7011 929 1190 Frontier Communications of Am

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

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

1:523 2:696 3:1 4:13 5:290 6:3
8:438 12:1975 13:1 14:623 15:11 16:3
17:6 20:24 23:205 24:1791 27:1307 31:1042
32:51 33:2 34:2 36:8 37:682 38:817
39:1 40:134 41:2814 42:158 44:3 46:1550
47:2 49:428 50:567 52:13 54:14 55:6
56:1 57:38 58:925 59:504 60:233 61:1178
62:936 63:2024 64:4235 65:2235 66:4502 67:2036
68:1155 69:3195 70:987 71:520 72:1868 74:2606
75:490 76:333 77:929 78:927 79:487 80:1227
81:953 82:646 83:509 84:513 85:1158 86:463
87:933 88:346 89:1789 90:302 91:5069 92:589
93:1314 94:1566 95:1224 96:400 97:318 98:894
99:36 100:22 101:255 103:1304 105:464 106:115
107:189 108:391 109:1472 110:781 111:943 112:424
113:666 114:666 115:845 116:892 117:718 118:948
119:1177 120:350 121:679 122:1635 123:1147 124:1309
125:1260 128:521 129:177 130:254 131:634 132:286
133:22 134:232 135:61 136:214 137:237 138:343
139:181 140:358 141:253 142:434 143:367 144:494
145:78 146:504 147:302 148:748 149:317 150:148
151:186 152:471 153:176 154:18 155:419 156:222
157:337 158:191 159:549 160:347 161:267 162:383
163:178 164:665 165:405 166:582 167:530 168:952
169:125 170:899 171:147 172:5 173:1737 174:609
175:423 176:568 177:977 178:1661 180:1324 181:113
182:1019 183:233 184:566 186:2012 187:1106 188:1383
189:1578 190:6129 192:5978 193:5442 194:4195 195:3208
196:1209 197:187 198:3645 199:4889 200:5879 201:1980
202:8458 203:8573 204:4322 205:2513 206:2703 207:2773
208:4045 209:3619 210:2691 211:1543 212:2018 213:1812
214:872 215:85 216:5063 217:1560 218:548 219:300
220:1233 221:551 222:301 223:339

End of report
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