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.

Thursday, September 19, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 20 Sep, 2013

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

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

BGP routing table entries examined: 463021
Prefixes after maximum aggregation: 187125
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 232232
Total ASes present in the Internet Routing Table: 40966
Prefixes per ASN: 11.30
Origin-only ASes present in the Internet Routing Table: 35190
Origin ASes announcing only one prefix: 16319
Transit ASes present in the Internet Routing Table: 5769
Transit-only ASes present in the Internet Routing Table: 142
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 27
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 270642
Unregistered ASNs in the Routing Table: 21165
Number of 32-bit ASNs allocated by the RIRs: 5054
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 12200
Special use prefixes present in the Routing Table: 11
Prefixes being announced from unallocated address space: 503
Number of addresses announced to Internet: 2664562688
Equivalent to 158 /8s, 210 /16s and 0 /24s
Percentage of available address space announced: 72.0
Percentage of allocated address space announced: 72.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.0
Total number of prefixes smaller than registry allocations: 161574

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

Prefixes being announced by APNIC Region ASes: 107079
Total APNIC prefixes after maximum aggregation: 32888
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 109714
Unique aggregates announced from the APNIC address blocks: 46599
APNIC Region origin ASes present in the Internet Routing Table: 4836
APNIC Prefixes per ASN: 22.69
APNIC Region origin ASes announcing only one prefix: 1237
APNIC Region transit ASes present in the Internet Routing Table: 817
Average APNIC Region AS path length visible: 3.8
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: 726990336
Equivalent to 43 /8s, 84 /16s and 254 /24s
Percentage of available APNIC address space announced: 85.0

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 63488-63999, 131072-133631
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: 161131
Total ARIN prefixes after maximum aggregation: 80922
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 161750
Unique aggregates announced from the ARIN address blocks: 75814
ARIN Region origin ASes present in the Internet Routing Table: 15840
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 6034
ARIN Region transit ASes present in the Internet Routing Table: 1599
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: 1071389184
Equivalent to 63 /8s, 220 /16s and 26 /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, 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: 119041
Total RIPE prefixes after maximum aggregation: 61101
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 122899
Unique aggregates announced from the RIPE address blocks: 79286
RIPE Region origin ASes present in the Internet Routing Table: 17423
RIPE Prefixes per ASN: 7.05
RIPE Region origin ASes announcing only one prefix: 8279
RIPE Region transit ASes present in the Internet Routing Table: 2785
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 24
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1
Number of RIPE addresses announced to Internet: 656999936
Equivalent to 39 /8s, 41 /16s and 6 /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, 61952-62463, 196608-200191
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: 50999
Total LACNIC prefixes after maximum aggregation: 9611
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 55798
Unique aggregates announced from the LACNIC address blocks: 26143
LACNIC Region origin ASes present in the Internet Routing Table: 2008
LACNIC Prefixes per ASN: 27.79
LACNIC Region origin ASes announcing only one prefix: 573
LACNIC Region transit ASes present in the Internet Routing Table: 359
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: 139040000
Equivalent to 8 /8s, 73 /16s and 149 /24s
Percentage of available LACNIC address space announced: 82.9

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: 11751
Total AfriNIC prefixes after maximum aggregation: 2530
AfriNIC Deaggregation factor: 4.64
Prefixes being announced from the AfriNIC address blocks: 12355
Unique aggregates announced from the AfriNIC address blocks: 3940
AfriNIC Region origin ASes present in the Internet Routing Table: 658
AfriNIC Prefixes per ASN: 18.78
AfriNIC Region origin ASes announcing only one prefix: 196
AfriNIC Region transit ASes present in the Internet Routing Table: 129
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: 46658560
Equivalent to 2 /8s, 199 /16s and 244 /24s
Percentage of available AfriNIC address space announced: 46.4

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 2676 903 91 >>UNKNOWN<<
4766 2120 11553 622 Korea Telecom
7545 2072 321 113 TPG Telecom Limited
4755 1802 403 192 TATA Communications formerly
9829 1550 1238 40 >>UNKNOWN<<
9583 1230 92 508 Sify Limited
9498 1189 309 72 BHARTI Airtel Ltd.
7552 1152 1080 13 >>UNKNOWN<<
24560 1089 380 164 >>UNKNOWN<<
4808 1073 2023 313 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 3067 3689 62 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
22773 2046 2933 125 >>UNKNOWN<<
1785 2013 679 125 >>UNKNOWN<<
20115 1679 1650 627 Charter Communications
4323 1613 1119 411 >>UNKNOWN<<
701 1530 11152 797 >>UNKNOWN<<
30036 1348 304 634 >>UNKNOWN<<
7018 1321 11277 837 >>UNKNOWN<<
22561 1234 386 201 >>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 1607 544 16 >>UNKNOWN<<
34984 1361 244 220 >>UNKNOWN<<
20940 1026 380 796 >>UNKNOWN<<
31148 987 43 17 >>UNKNOWN<<
6830 895 2367 427 >>UNKNOWN<<
13188 847 99 70 >>UNKNOWN<<
8551 760 370 41 Bezeqint Internet Backbone
12479 677 799 49 >>UNKNOWN<<
9116 553 326 34 >>UNKNOWN<<
35228 526 246 16 >>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 3278 1728 91 >>UNKNOWN<<
10620 2573 420 250 >>UNKNOWN<<
7303 1712 1134 226 >>UNKNOWN<<
18881 1432 844 20 >>UNKNOWN<<
8151 1275 2781 391 >>UNKNOWN<<
11830 865 364 15 >>UNKNOWN<<
6503 818 434 65 Axtel, S.A.B. de C.V.
27947 809 94 95 Telconet S.A
7738 779 1498 36 >>UNKNOWN<<
6147 739 376 21 Telefonica del Peru S.A.A.

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 1864 112 5 MOBITEL
24863 876 274 30 >>UNKNOWN<<
6713 554 633 26 Itissalat Al-MAGHRIB
8452 425 956 9 >>UNKNOWN<<
24835 291 80 8 >>UNKNOWN<<
3741 258 921 216 >>UNKNOWN<<
29571 222 17 12 >>UNKNOWN<<
36992 222 501 28 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29975 191 667 21 >>UNKNOWN<<

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 3278 1728 91 >>UNKNOWN<<
6389 3067 3689 62 BellSouth.net Inc.
17974 2676 903 91 >>UNKNOWN<<
10620 2573 420 250 >>UNKNOWN<<
4766 2120 11553 622 Korea Telecom
7545 2072 321 113 TPG Telecom Limited
18566 2063 382 183 Covad Communications Co.
22773 2046 2933 125 >>UNKNOWN<<
1785 2013 679 125 >>UNKNOWN<<
36998 1864 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 3067 3005 BellSouth.net Inc.
17974 2676 2585 >>UNKNOWN<<
10620 2573 2323 >>UNKNOWN<<
7545 2072 1959 TPG Telecom Limited
22773 2046 1921 >>UNKNOWN<<
1785 2013 1888 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1864 1859 MOBITEL
4755 1802 1610 TATA Communications formerly
8402 1607 1591 >>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
9772 UNALLOCATED 1.232.171.0/24 4766 Korea Telecom
2385 UNALLOCATED 1.232.172.0/24 4766 Korea Telecom
38413 UNALLOCATED 1.233.22.0/24 4766 Korea Telecom
4665 UNALLOCATED 1.233.206.0/24 9318 Hanaro Telecom Inc.
4665 UNALLOCATED 1.233.206.0/23 9318 Hanaro Telecom Inc.
4665 UNALLOCATED 1.233.207.0/24 18302 >>UNKNOWN<<
4665 UNALLOCATED 1.233.208.0/21 9318 Hanaro Telecom Inc.
4665 UNALLOCATED 1.233.208.0/20 9318 Hanaro Telecom Inc.
4665 UNALLOCATED 1.233.216.0/21 18302 >>UNKNOWN<<
4665 UNALLOCATED 1.233.224.0/22 9318 Hanaro Telecom 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
10.1.1.48/29 0 *
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

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<<
23.90.192.0/18 36086 >>UNKNOWN<<
23.91.0.0/19 40676 >>UNKNOWN<<
23.91.32.0/19 36315 >>UNKNOWN<<
23.91.96.0/20 40676 >>UNKNOWN<<
23.91.112.0/21 32475 >>UNKNOWN<<
23.91.160.0/22 36493 FIBERNETICS CORPORATION
23.91.160.0/19 36493 FIBERNETICS CORPORATION
23.91.164.0/22 36493 FIBERNETICS CORPORATION
23.91.168.0/22 36493 FIBERNETICS CORPORATION

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 /10:32 /11:93 /12:251
/13:477 /14:913 /15:1625 /16:12773 /17:6724 /18:11091
/19:22963 /20:32556 /21:35038 /22:49203 /23:42541 /24:246066
/25:9 /26:11 /27:11 /28:130 /29:212 /30:137
/31:0 /32:137

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

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1829 1864 MOBITEL
6389 1712 3067 BellSouth.net Inc.
8402 1367 1607 >>UNKNOWN<<
22773 1332 2046 >>UNKNOWN<<
30036 1208 1348 >>UNKNOWN<<
11492 1187 1228 >>UNKNOWN<<
1785 1084 2013 >>UNKNOWN<<
6983 1025 1150 ITC^Deltacom
22561 958 1234 >>UNKNOWN<<

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

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

1:808 2:858 3:3 4:16 5:969 6:19
8:593 12:1897 13:3 14:843 15:11 16:3
17:12 18:19 20:21 23:405 24:1740 27:1573
31:1474 32:40 33:2 34:5 36:80 37:1837
38:902 39:3 40:179 41:3314 42:252 44:13
46:1997 47:7 49:671 50:809 52:12 54:39
55:7 57:29 58:1089 59:630 60:340 61:1476
62:1202 63:1985 64:4558 65:2356 66:4171 67:2084
68:1086 69:3294 70:865 71:494 72:2006 74:2549
75:330 76:303 77:1146 78:1009 79:621 80:1322
81:1030 82:641 83:580 84:582 85:1263 86:488
87:1050 88:554 89:1805 90:158 91:5712 92:604
93:1623 94:2021 95:1581 96:518 97:342 98:1041
99:40 100:30 101:359 103:3305 105:519 106:142
107:208 108:489 109:1886 110:958 111:1120 112:574
113:795 114:703 115:1035 116:959 117:797 118:1156
119:1263 120:349 121:852 122:1797 123:1254 124:1349
125:1425 128:544 129:301 130:309 131:664 132:339
133:161 134:534 135:67 136:271 137:264 138:347
139:177 140:179 141:302 142:538 143:405 144:498
145:100 146:505 147:487 148:671 149:351 150:152
151:585 152:412 153:195 154:46 155:483 156:273
157:371 158:285 159:675 160:351 161:425 162:701
163:208 164:625 165:566 166:259 167:611 168:1035
169:126 170:1086 171:193 172:25 173:1599 174:663
175:487 176:1200 177:2311 178:1896 179:139 180:1518
181:734 182:1260 183:462 184:630 185:859 186:2519
187:1461 188:1894 189:1317 190:7002 192:6878 193:5662
194:4057 195:3335 196:1341 197:1043 198:4626 199:5400
200:6005 201:2540 202:8807 203:8839 204:4451 205:2615
206:2753 207:2824 208:3998 209:3585 210:2854 211:1549
212:2305 213:2049 214:931 215:99 216:5285 217:1653
218:611 219:326 220:1274 221:559 222:324 223:497


End of report
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