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, September 9, 2013

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 461641
Prefixes after maximum aggregation: 186774
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 231487
Total ASes present in the Internet Routing Table: 40883
Prefixes per ASN: 11.29
Origin-only ASes present in the Internet Routing Table: 35104
Origin ASes announcing only one prefix: 16280
Transit ASes present in the Internet Routing Table: 5772
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: 272574
Unregistered ASNs in the Routing Table: 21080
Number of 32-bit ASNs allocated by the RIRs: 5010
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11945
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 402
Number of addresses announced to Internet: 2661532928
Equivalent to 158 /8s, 163 /16s and 197 /24s
Percentage of available address space announced: 71.9
Percentage of allocated address space announced: 71.9
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: 160949

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

Prefixes being announced by APNIC Region ASes: 106704
Total APNIC prefixes after maximum aggregation: 32780
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 109307
Unique aggregates announced from the APNIC address blocks: 46408
APNIC Region origin ASes present in the Internet Routing Table: 4834
APNIC Prefixes per ASN: 22.61
APNIC Region origin ASes announcing only one prefix: 1243
APNIC Region transit ASes present in the Internet Routing Table: 813
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: 725938688
Equivalent to 43 /8s, 68 /16s and 242 /24s
Percentage of available APNIC address space announced: 84.8

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: 160028
Total ARIN prefixes after maximum aggregation: 80641
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 160656
Unique aggregates announced from the ARIN address blocks: 75433
ARIN Region origin ASes present in the Internet Routing Table: 15805
ARIN Prefixes per ASN: 10.16
ARIN Region origin ASes announcing only one prefix: 6011
ARIN Region transit ASes present in the Internet Routing Table: 1601
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: 1071152384
Equivalent to 63 /8s, 216 /16s and 125 /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: 119981
Total RIPE prefixes after maximum aggregation: 61145
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123794
Unique aggregates announced from the RIPE address blocks: 79451
RIPE Region origin ASes present in the Internet Routing Table: 17398
RIPE Prefixes per ASN: 7.12
RIPE Region origin ASes announcing only one prefix: 8253
RIPE Region transit ASes present in the Internet Routing Table: 2789
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: 657351424
Equivalent to 39 /8s, 46 /16s and 99 /24s
Percentage of available RIPE address space announced: 95.6

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
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: 50411
Total LACNIC prefixes after maximum aggregation: 9607
LACNIC Deaggregation factor: 5.25
Prefixes being announced from the LACNIC address blocks: 55065
Unique aggregates announced from the LACNIC address blocks: 25873
LACNIC Region origin ASes present in the Internet Routing Table: 2003
LACNIC Prefixes per ASN: 27.49
LACNIC Region origin ASes announcing only one prefix: 572
LACNIC Region transit ASes present in the Internet Routing Table: 367
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: 137448704
Equivalent to 8 /8s, 49 /16s and 77 /24s
Percentage of available LACNIC address space announced: 81.9

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: 11799
Total AfriNIC prefixes after maximum aggregation: 2551
AfriNIC Deaggregation factor: 4.63
Prefixes being announced from the AfriNIC address blocks: 12416
Unique aggregates announced from the AfriNIC address blocks: 3953
AfriNIC Region origin ASes present in the Internet Routing Table: 658
AfriNIC Prefixes per ASN: 18.87
AfriNIC Region origin ASes announcing only one prefix: 201
AfriNIC Region transit ASes present in the Internet Routing Table: 131
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: 46565632
Equivalent to 2 /8s, 198 /16s and 137 /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 2667 903 90 >>UNKNOWN<<
4766 2119 11553 622 Korea Telecom
7545 2062 321 112 TPG Telecom Limited
4755 1800 401 194 TATA Communications formerly
9829 1539 1237 45 >>UNKNOWN<<
9583 1227 92 511 Sify Limited
9498 1185 309 71 BHARTI Airtel Ltd.
7552 1144 1080 13 >>UNKNOWN<<
24560 1089 394 163 >>UNKNOWN<<
4808 1074 2023 315 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 3068 3689 62 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
22773 2044 2933 126 >>UNKNOWN<<
1785 2012 679 124 >>UNKNOWN<<
20115 1678 1648 628 Charter Communications
4323 1616 1119 410 >>UNKNOWN<<
701 1520 11135 798 >>UNKNOWN<<
30036 1348 303 643 >>UNKNOWN<<
7018 1318 11309 833 >>UNKNOWN<<
11492 1222 218 365 >>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 1675 544 16 >>UNKNOWN<<
34984 1322 244 221 >>UNKNOWN<<
2118 1164 97 13 >>UNKNOWN<<
20940 1000 363 771 >>UNKNOWN<<
31148 982 43 18 >>UNKNOWN<<
6830 895 2367 427 >>UNKNOWN<<
13188 848 99 70 >>UNKNOWN<<
8551 759 370 41 Bezeqint Internet Backbone
12479 688 797 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 3243 1720 96 >>UNKNOWN<<
10620 2549 416 259 >>UNKNOWN<<
7303 1701 1126 222 >>UNKNOWN<<
18881 1432 844 20 >>UNKNOWN<<
8151 1273 2774 389 >>UNKNOWN<<
11830 865 364 15 >>UNKNOWN<<
27947 813 94 93 Telconet S.A
6503 807 434 65 Axtel, S.A.B. de C.V.
7738 764 1498 36 >>UNKNOWN<<
3816 727 303 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 867 274 30 >>UNKNOWN<<
6713 543 633 26 Itissalat Al-MAGHRIB
8452 422 956 9 >>UNKNOWN<<
24835 282 80 8 >>UNKNOWN<<
3741 257 921 216 >>UNKNOWN<<
36992 222 501 28 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29571 221 17 12 >>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 3243 1720 96 >>UNKNOWN<<
6389 3068 3689 62 BellSouth.net Inc.
17974 2667 903 90 >>UNKNOWN<<
10620 2549 416 259 >>UNKNOWN<<
4766 2119 11553 622 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2062 321 112 TPG Telecom Limited
22773 2044 2933 126 >>UNKNOWN<<
1785 2012 679 124 >>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 3068 3006 BellSouth.net Inc.
17974 2667 2577 >>UNKNOWN<<
10620 2549 2290 >>UNKNOWN<<
7545 2062 1950 TPG Telecom Limited
22773 2044 1918 >>UNKNOWN<<
1785 2012 1888 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1861 1856 MOBITEL
8402 1675 1659 >>UNKNOWN<<
4755 1800 1606 TATA Communications formerly

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

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

Bad AS Designation Network Transit AS Description
55602 UNALLOCATED 1.230.104.0/24 4766 Korea Telecom
38397 UNALLOCATED 1.230.107.0/24 9318 Hanaro Telecom Inc.
38397 UNALLOCATED 1.230.108.0/24 9318 Hanaro Telecom Inc.
38397 UNALLOCATED 1.230.109.0/24 9318 Hanaro Telecom Inc.
38397 UNALLOCATED 1.230.110.0/24 9318 Hanaro Telecom Inc.
3357 UNALLOCATED 1.230.111.0/24 4766 Korea Telecom
3357 UNALLOCATED 1.230.112.0/24 4766 Korea Telecom
3357 UNALLOCATED 1.230.113.0/24 4766 Korea Telecom
17873 UNALLOCATED 1.230.122.0/24 3786 LG DACOM Corporation
45980 UNALLOCATED 1.230.123.0/24 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
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<<
23.90.192.0/18 36086 >>UNKNOWN<<
23.91.0.0/19 40676 >>UNKNOWN<<
23.91.32.0/19 36315 >>UNKNOWN<<
23.91.96.0/20 40676 >>UNKNOWN<<
23.91.160.0/22 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
23.91.172.0/22 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 /14:907 /15:1622 /16:12744 /17:6722 /18:11067
/19:22776 /20:32461 /21:34908 /22:48941 /23:42649 /24:245320
/25:8 /26:11 /27:11 /28:131 /29:212 /30:137
/31:0 /32:133

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 3068 BellSouth.net Inc.
8402 1403 1675 >>UNKNOWN<<
22773 1330 2044 >>UNKNOWN<<
30036 1209 1348 >>UNKNOWN<<
11492 1183 1222 >>UNKNOWN<<
1785 1085 2012 >>UNKNOWN<<
6983 1025 1150 ITC^Deltacom
7011 934 1177 Frontier Communications of Am

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

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

1:805 2:871 3:3 4:16 5:933 6:19
8:606 12:1889 13:3 14:842 15:11 16:3
17:11 18:19 20:18 23:382 24:1741 27:1564
31:1443 32:40 33:2 34:5 36:79 37:1866
38:894 39:5 40:179 41:3359 42:251 44:9
46:1965 47:5 49:666 50:805 52:12 54:37
55:7 57:29 58:1090 59:647 60:334 61:1475
62:1228 63:1986 64:4553 65:2307 66:4161 67:2065
68:1080 69:3289 70:863 71:495 72:2003 74:2549
75:329 76:304 77:1134 78:1046 79:623 80:1319
81:1026 82:654 83:582 84:580 85:1267 86:500
87:1053 88:556 89:1836 90:158 91:5631 92:606
93:1676 94:2034 95:1589 96:511 97:342 98:1037
99:41 100:30 101:348 103:3290 105:519 106:142
107:208 108:483 109:1870 110:952 111:1126 112:567
113:792 114:709 115:1025 116:960 117:794 118:1122
119:1270 120:352 121:849 122:1797 123:1253 124:1350
125:1419 128:577 129:201 130:307 131:663 132:343
133:161 134:276 135:63 136:271 137:264 138:348
139:177 140:169 141:312 142:538 143:383 144:484
145:99 146:533 147:480 148:676 149:354 150:148
151:582 152:414 153:195 154:46 155:480 156:271
157:359 158:285 159:668 160:349 161:432 162:642
163:201 164:624 165:554 166:256 167:599 168:1021
169:124 170:1083 171:194 172:25 173:1593 174:518
175:489 176:1180 177:2179 178:1900 179:117 180:1518
181:701 182:1261 183:430 184:629 185:809 186:2479
187:1436 188:1896 189:1298 190:6922 192:6853 193:5688
194:4633 195:3566 196:1361 197:1081 198:4604 199:5386
200:5964 201:2468 202:8733 203:8827 204:4458 205:2598
206:2749 207:2824 208:3988 209:3591 210:2838 211:1556
212:2226 213:2057 214:903 215:99 216:5262 217:1656
218:611 219:325 220:1273 221:558 222:324 223:494


End of report
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