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.

Saturday, July 28, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sun 29 Jul, 2012

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

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

BGP routing table entries examined: 412008
Prefixes after maximum aggregation: 174436
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 204456
Total ASes present in the Internet Routing Table: 38837
Prefixes per ASN: 10.61
Origin-only ASes present in the Internet Routing Table: 33448
Origin ASes announcing only one prefix: 15743
Transit ASes present in the Internet Routing Table: 5389
Transit-only ASes present in the Internet Routing Table: 117
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: 1053
Unregistered ASNs in the Routing Table: 191
Number of 32-bit ASNs allocated by the RIRs: 3048
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6858
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 173
Number of addresses announced to Internet: 2590634752
Equivalent to 154 /8s, 105 /16s and 243 /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: 142480

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

Prefixes being announced by APNIC Region ASes: 96531
Total APNIC prefixes after maximum aggregation: 31235
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 97614
Unique aggregates announced from the APNIC address blocks: 42220
APNIC Region origin ASes present in the Internet Routing Table: 4677
APNIC Prefixes per ASN: 20.87
APNIC Region origin ASes announcing only one prefix: 1267
APNIC Region transit ASes present in the Internet Routing Table: 729
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: 703702016
Equivalent to 41 /8s, 241 /16s and 164 /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: 151834
Total ARIN prefixes after maximum aggregation: 77293
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 152843
Unique aggregates announced from the ARIN address blocks: 68745
ARIN Region origin ASes present in the Internet Routing Table: 15156
ARIN Prefixes per ASN: 10.08
ARIN Region origin ASes announcing only one prefix: 5772
ARIN Region transit ASes present in the Internet Routing Table: 1520
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: 1072377344
Equivalent to 63 /8s, 235 /16s and 46 /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: 104446
Total RIPE prefixes after maximum aggregation: 55472
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 106668
Unique aggregates announced from the RIPE address blocks: 68008
RIPE Region origin ASes present in the Internet Routing Table: 16706
RIPE Prefixes per ASN: 6.39
RIPE Region origin ASes announcing only one prefix: 8113
RIPE Region transit ASes present in the Internet Routing Table: 2656
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: 637703936
Equivalent to 38 /8s, 2 /16s and 151 /24s
Percentage of available RIPE address space announced: 92.7

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
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: 42226
Total LACNIC prefixes after maximum aggregation: 8223
LACNIC Deaggregation factor: 5.14
Prefixes being announced from the LACNIC address blocks: 44923
Unique aggregates announced from the LACNIC address blocks: 21933
LACNIC Region origin ASes present in the Internet Routing Table: 1603
LACNIC Prefixes per ASN: 28.02
LACNIC Region origin ASes announcing only one prefix: 426
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: 112939776
Equivalent to 6 /8s, 187 /16s and 83 /24s
Percentage of available LACNIC address space announced: 67.3

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

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

Prefixes being announced by AfriNIC Region ASes: 9385
Total AfriNIC prefixes after maximum aggregation: 2159
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 9786
Unique aggregates announced from the AfriNIC address blocks: 3400
AfriNIC Region origin ASes present in the Internet Routing Table: 545
AfriNIC Prefixes per ASN: 17.96
AfriNIC Region origin ASes announcing only one prefix: 165
AfriNIC Region transit ASes present in the Internet Routing Table: 115
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: 41319680
Equivalent to 2 /8s, 118 /16s and 125 /24s
Percentage of available AfriNIC address space announced: 41.0

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 2269 569 90 PT Telekomunikasi Indonesia
4766 2024 11112 784 Korea Telecom (KIX)
7545 1686 301 88 TPG Internet Pty Ltd
4755 1599 387 161 TATA Communications formerly
9829 1309 1084 31 National Internet Backbone
9583 1161 87 509 Sify Limited
7552 1110 1062 11 Vietel Corporation
24560 1037 385 165 Bharti Airtel Ltd., Telemedia
9498 990 294 72 BHARTI Airtel Ltd.
4808 963 1942 287 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 3412 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 1573 1043 381 tw telecom holdings, inc.
30036 1408 275 791 Mediacom Communications Corp
7018 1263 10073 829 AT&T Services, Inc.
11492 1192 217 350 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 1481 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 689 226 550 Akamai Technologies European
2118 632 97 14 EUnet/RELCOM Autonomous Syste
13188 613 100 9 Ukraine
8551 601 364 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 2044 1226 58 Types of queries are: POCs, o
10620 2031 349 213 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 1335 3052 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 597 248 87 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 1031 958 13 TEDATA
24863 861 274 32 LINKdotNET AS number
6713 509 650 19 Itissalat Al-MAGHRIB
36998 483 48 3 MOBITEL
24835 286 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 160 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 3412 986 155 Windstream Communications Inc
6389 3383 3773 192 BellSouth.net Inc.
17974 2269 569 90 PT Telekomunikasi Indonesia
18566 2089 382 181 Covad Communications Co.
28573 2044 1226 58 Types of queries are: POCs, o
10620 2031 349 213 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 1686 301 88 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 2269 2179 PT Telekomunikasi Indonesia
28573 2044 1986 Types of queries are: POCs, o
18566 2089 1908 Covad Communications Co.
10620 2031 1818 Types of queries are: POCs, o
1785 1940 1809 PaeTec Communications, Inc.
7545 1686 1598 TPG Internet Pty Ltd
22773 1697 1572 Cox Communications Inc.
8402 1481 1465 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 5.149.64.0/19 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.66.0/24 35567 DASTO semtel d.o.o.
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 *
32805 UNALLOCATED 12.1.225.0/24 7018 AT&T Services, Inc.
15132 UNALLOCATED 12.9.150.0/24 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
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
5.159.40.0/21 23456 32-bit ASN transition
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 /14:846 /15:1524 /16:12265 /17:6372 /18:10659
/19:20806 /20:29833 /21:31404 /22:40923 /23:39218 /24:216732
/25:11 /26:22 /27:19 /28:149 /29:152 /30:83
/31:0 /32:138

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

ASN No of nets Total ann. Description
7029 2773 3412 Windstream Communications Inc
18566 2039 2089 Covad Communications Co.
6389 1864 3383 BellSouth.net Inc.
30036 1343 1408 Mediacom Communications Corp
8402 1180 1481 Corbina telecom
11492 1155 1192 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 930 1191 Frontier Communications of Am

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

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

1:525 2:616 3:1 4:13 5:271 6:3
8:438 12:1973 13:1 14:616 15:11 16:3
17:6 20:24 23:202 24:1792 27:1307 31:1036
32:51 33:2 34:2 36:8 37:673 38:820
39:1 40:134 41:2772 42:158 44:3 46:1553
47:2 49:429 50:564 52:13 54:14 55:8
56:1 57:38 58:921 59:529 60:233 61:1247
62:932 63:2025 64:4234 65:2239 66:4505 67:2014
68:1154 69:3194 70:986 71:520 72:1871 74:2605
75:489 76:333 77:930 78:926 79:490 80:1233
81:951 82:649 83:540 84:512 85:1162 86:461
87:931 88:346 89:1761 90:301 91:5070 92:587
93:1305 94:1566 95:1219 96:400 97:315 98:893
99:36 100:21 101:253 103:1298 105:464 106:115
107:189 108:388 109:1456 110:779 111:940 112:423
113:666 114:659 115:897 116:893 117:719 118:944
119:1174 120:349 121:792 122:1635 123:1153 124:1309
125:1260 128:502 129:179 130:251 131:634 132:291
133:22 134:235 135:61 136:214 137:237 138:342
139:181 140:469 141:253 142:418 143:366 144:490
145:78 146:497 147:295 148:747 149:316 150:147
151:186 152:471 153:176 154:18 155:414 156:222
157:336 158:190 159:548 160:346 161:267 162:382
163:178 164:664 165:404 166:585 167:536 168:952
169:126 170:898 171:147 172:5 173:1733 174:609
175:423 176:568 177:998 178:1651 180:1322 181:113
182:1018 183:206 184:558 186:2030 187:1096 188:1380
189:1581 190:6146 192:5973 193:5443 194:4194 195:3206
196:1193 197:184 198:3639 199:4896 200:5885 201:1977
202:8445 203:8575 204:4324 205:2514 206:2703 207:2771
208:4046 209:3619 210:2702 211:1542 212:2049 213:1810
214:863 215:85 216:5057 217:1566 218:548 219:321
220:1229 221:552 222:300 223:338

End of report
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