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.

Wednesday, August 21, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Thu 22 Aug, 2013

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

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

BGP routing table entries examined: 458605
Prefixes after maximum aggregation: 185447
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 229707
Total ASes present in the Internet Routing Table: 40784
Prefixes per ASN: 11.24
Origin-only ASes present in the Internet Routing Table: 35007
Origin ASes announcing only one prefix: 16250
Transit ASes present in the Internet Routing Table: 5770
Transit-only ASes present in the Internet Routing Table: 156
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: 284886
Unregistered ASNs in the Routing Table: 23119
Number of 32-bit ASNs allocated by the RIRs: 4966
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11638
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 322
Number of addresses announced to Internet: 2657026816
Equivalent to 158 /8s, 95 /16s and 3 /24s
Percentage of available address space announced: 71.8
Percentage of allocated address space announced: 71.8
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.9
Total number of prefixes smaller than registry allocations: 160011

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

Prefixes being announced by APNIC Region ASes: 106149
Total APNIC prefixes after maximum aggregation: 32619
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 108613
Unique aggregates announced from the APNIC address blocks: 46268
APNIC Region origin ASes present in the Internet Routing Table: 4836
APNIC Prefixes per ASN: 22.46
APNIC Region origin ASes announcing only one prefix: 1251
APNIC Region transit ASes present in the Internet Routing Table: 805
Average APNIC Region AS path length visible: 3.9
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 1
Number of APNIC addresses announced to Internet: 725058304
Equivalent to 43 /8s, 55 /16s and 131 /24s
Percentage of available APNIC address space announced: 84.7

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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: 159456
Total ARIN prefixes after maximum aggregation: 80342
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 160022
Unique aggregates announced from the ARIN address blocks: 74800
ARIN Region origin ASes present in the Internet Routing Table: 15774
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 6006
ARIN Region transit ASes present in the Internet Routing Table: 1620
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 2
Number of ARIN addresses announced to Internet: 1070375168
Equivalent to 63 /8s, 204 /16s and 161 /24s
Percentage of available ARIN address space announced: 56.6

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, 62464-63487, 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: 118844
Total RIPE prefixes after maximum aggregation: 60471
RIPE Deaggregation factor: 1.97
Prefixes being announced from the RIPE address blocks: 122712
Unique aggregates announced from the RIPE address blocks: 78733
RIPE Region origin ASes present in the Internet Routing Table: 17340
RIPE Prefixes per ASN: 7.08
RIPE Region origin ASes announcing only one prefix: 8231
RIPE Region transit ASes present in the Internet Routing Table: 2791
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 21
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1
Number of RIPE addresses announced to Internet: 656980736
Equivalent to 39 /8s, 40 /16s and 187 /24s
Percentage of available RIPE address space announced: 95.5

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: 50067
Total LACNIC prefixes after maximum aggregation: 9435
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 54656
Unique aggregates announced from the LACNIC address blocks: 25665
LACNIC Region origin ASes present in the Internet Routing Table: 1991
LACNIC Prefixes per ASN: 27.45
LACNIC Region origin ASes announcing only one prefix: 569
LACNIC Region transit ASes present in the Internet Routing Table: 350
Average LACNIC Region AS path length visible: 4.2
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 2
Number of LACNIC addresses announced to Internet: 135330048
Equivalent to 8 /8s, 16 /16s and 249 /24s
Percentage of available LACNIC address space announced: 80.7

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 262144-263679 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: 11700
Total AfriNIC prefixes after maximum aggregation: 2539
AfriNIC Deaggregation factor: 4.61
Prefixes being announced from the AfriNIC address blocks: 12279
Unique aggregates announced from the AfriNIC address blocks: 3938
AfriNIC Region origin ASes present in the Internet Routing Table: 652
AfriNIC Prefixes per ASN: 18.83
AfriNIC Region origin ASes announcing only one prefix: 193
AfriNIC Region transit ASes present in the Internet Routing Table: 130
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: 1
Number of AfriNIC addresses announced to Internet: 46585088
Equivalent to 2 /8s, 198 /16s and 213 /24s
Percentage of available AfriNIC address space announced: 46.3

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 2656 871 92 >>UNKNOWN<<
4766 2115 11553 620 Korea Telecom
7545 2057 321 113 TPG Telecom Limited
4755 1791 401 192 TATA Communications formerly
9829 1533 1221 45 >>UNKNOWN<<
9583 1224 92 508 Sify Limited
9498 1177 309 71 BHARTI Airtel Ltd.
7552 1128 1080 13 >>UNKNOWN<<
24560 1089 394 160 >>UNKNOWN<<
4808 1066 2022 308 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 2978 3689 62 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
22773 2042 2935 128 >>UNKNOWN<<
1785 2006 679 125 >>UNKNOWN<<
20115 1676 1646 621 Charter Communications
4323 1637 1122 410 >>UNKNOWN<<
701 1521 11104 799 >>UNKNOWN<<
30036 1352 303 651 >>UNKNOWN<<
7018 1320 11325 840 >>UNKNOWN<<
11492 1223 218 361 >>UNKNOWN<<

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 1574 544 16 >>UNKNOWN<<
34984 1296 241 216 >>UNKNOWN<<
31148 979 43 18 >>UNKNOWN<<
20940 974 351 747 >>UNKNOWN<<
2118 962 97 13 >>UNKNOWN<<
6830 886 2371 430 >>UNKNOWN<<
13188 845 99 71 >>UNKNOWN<<
8551 806 370 41 Bezeqint Internet Backbone
12479 687 797 53 >>UNKNOWN<<
9116 553 326 34 >>UNKNOWN<<

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 3141 1675 107 >>UNKNOWN<<
10620 2669 424 223 >>UNKNOWN<<
7303 1732 1157 222 >>UNKNOWN<<
18881 1369 844 20 >>UNKNOWN<<
8151 1267 2766 388 >>UNKNOWN<<
11830 945 364 15 >>UNKNOWN<<
27947 811 95 92 Telconet S.A
6503 784 434 65 Axtel, S.A.B. de C.V.
6147 739 374 25 >>UNKNOWN<<
3816 725 303 85 >>UNKNOWN<<

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
36998 1861 112 5 MOBITEL
24863 872 274 30 >>UNKNOWN<<
6713 543 633 26 Itissalat Al-MAGHRIB
8452 437 956 9 >>UNKNOWN<<
24835 291 80 8 >>UNKNOWN<<
3741 258 921 217 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29571 220 17 12 >>UNKNOWN<<
36992 220 501 29 >>UNKNOWN<<
12258 193 28 71 MWEB-12258

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
28573 3141 1675 107 >>UNKNOWN<<
6389 2978 3689 62 BellSouth.net Inc.
10620 2669 424 223 >>UNKNOWN<<
17974 2656 871 92 >>UNKNOWN<<
4766 2115 11553 620 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2057 321 113 TPG Telecom Limited
22773 2042 2935 128 >>UNKNOWN<<
1785 2006 679 125 >>UNKNOWN<<
36998 1861 112 5 MOBITEL

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 2978 2916 BellSouth.net Inc.
17974 2656 2564 >>UNKNOWN<<
10620 2669 2446 >>UNKNOWN<<
7545 2057 1944 TPG Telecom Limited
22773 2042 1914 >>UNKNOWN<<
1785 2006 1881 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1861 1856 MOBITEL
4755 1791 1599 TATA Communications formerly
8402 1574 1558 >>UNKNOWN<<

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
23724 UNALLOCATED 1.202.214.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.215.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.216.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.217.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.218.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.218.0/23 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.219.0/24 4134 No.31,Jin-rong Stree
18340 UNALLOCATED 1.209.36.0/24 3786 LG DACOM Corporation
18176 UNALLOCATED 1.209.60.0/22 3786 LG DACOM Corporation
18176 UNALLOCATED 1.209.64.0/22 3786 LG DACOM Corporation

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
100.64.0.0/10 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
192.0.0.0/24 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
198.51.100.0/24 65333 Internet Assigned Numbers Aut
203.0.113.0/24 65333 Internet Assigned Numbers Aut

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
23.90.128.0/18 27418 >>UNKNOWN<<
23.91.0.0/19 40676 >>UNKNOWN<<
23.92.16.0/21 8001 >>UNKNOWN<<
23.92.24.0/22 6939 Hurricane Electric, Inc.
23.92.64.0/24 54540 >>UNKNOWN<<
23.92.65.0/24 54540 >>UNKNOWN<<
23.92.66.0/24 54540 >>UNKNOWN<<
23.92.67.0/24 54540 >>UNKNOWN<<
23.92.68.0/24 54540 >>UNKNOWN<<
23.92.69.0/24 54540 >>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 /8:17 /9:11 /10:31 /11:93 /12:251
/13:478 /14:903 /15:1616 /16:12716 /17:6656 /18:10990
/19:22644 /20:32280 /21:34732 /22:48478 /23:42391 /24:243686
/25:8 /26:11 /27:11 /28:134 /29:208 /30:122
/31:0 /32:138

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

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1826 1861 MOBITEL
6389 1713 2978 BellSouth.net Inc.
22773 1331 2042 >>UNKNOWN<<
8402 1320 1574 >>UNKNOWN<<
30036 1214 1352 >>UNKNOWN<<
11492 1184 1223 >>UNKNOWN<<
1785 1079 2006 >>UNKNOWN<<
6983 1023 1150 ITC^Deltacom
10620 992 2669 >>UNKNOWN<<

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

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

1:805 2:778 3:3 4:16 5:907 6:17
8:588 12:1895 13:2 14:847 15:11 16:3
17:10 18:19 20:17 23:345 24:1734 27:1548
31:1417 32:40 33:2 34:5 36:70 37:1818
38:895 39:2 40:180 41:3297 42:241 44:9
46:1968 47:4 49:657 50:808 52:12 54:37
55:7 57:29 58:1092 59:641 60:329 61:1472
62:1175 63:1975 64:4549 65:2152 66:4209 67:2076
68:1094 69:3284 70:863 71:491 72:1980 74:2527
75:325 76:307 77:1114 78:1108 79:617 80:1291
81:1024 82:674 83:585 84:567 85:1219 86:479
87:1052 88:538 89:1817 90:157 91:5581 92:647
93:1661 94:2017 95:1563 96:523 97:347 98:1035
99:41 100:28 101:346 103:3151 105:519 106:138
107:209 108:480 109:1857 110:930 111:1097 112:571
113:799 114:703 115:1060 116:947 117:784 118:1120
119:1271 120:349 121:849 122:1788 123:1245 124:1335
125:1413 128:563 129:202 130:297 131:660 132:341
133:160 134:266 135:67 136:266 137:263 138:345
139:186 140:173 141:308 142:514 143:389 144:491
145:95 146:526 147:473 148:658 149:341 150:151
151:559 152:414 153:194 154:30 155:481 156:270
157:356 158:282 159:661 160:350 161:431 162:603
163:202 164:624 165:549 166:256 167:599 168:1023
169:125 170:1074 171:191 172:25 173:1567 174:517
175:480 176:1173 177:2157 178:1904 179:100 180:1518
181:663 182:1218 183:439 184:658 185:764 186:2408
187:1405 188:1880 189:1275 190:6967 192:6864 193:5529
194:4596 195:3594 196:1330 197:1027 198:4550 199:5360
200:5964 201:2605 202:8697 203:8786 204:4448 205:2577
206:2742 207:2827 208:3992 209:3598 210:2809 211:1552
212:2297 213:2053 214:927 215:100 216:5271 217:1658
218:609 219:317 220:1274 221:553 222:322 223:501


End of report
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