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.

Sunday, July 21, 2013

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 453710
Prefixes after maximum aggregation: 184881
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 228345
Total ASes present in the Internet Routing Table: 40634
Prefixes per ASN: 11.17
Origin-only ASes present in the Internet Routing Table: 34907
Origin ASes announcing only one prefix: 16229
Transit ASes present in the Internet Routing Table: 5720
Transit-only ASes present in the Internet Routing Table: 132
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 63
Max AS path prepend of ASN ( 2914) 60
Prefixes from unregistered ASNs in the Routing Table: 312563
Unregistered ASNs in the Routing Table: 26005
Number of 32-bit ASNs allocated by the RIRs: 4888
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11308
Special use prefixes present in the Routing Table: 33
Prefixes being announced from unallocated address space: 270
Number of addresses announced to Internet: 2650699008
Equivalent to 157 /8s, 254 /16s and 117 /24s
Percentage of available address space announced: 71.6
Percentage of allocated address space announced: 71.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.7
Total number of prefixes smaller than registry allocations: 157292

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

Prefixes being announced by APNIC Region ASes: 105062
Total APNIC prefixes after maximum aggregation: 32510
APNIC Deaggregation factor: 3.23
Prefixes being announced from the APNIC address blocks: 107619
Unique aggregates announced from the APNIC address blocks: 46021
APNIC Region origin ASes present in the Internet Routing Table: 4820
APNIC Prefixes per ASN: 22.33
APNIC Region origin ASes announcing only one prefix: 1245
APNIC Region transit ASes present in the Internet Routing Table: 796
Average APNIC Region AS path length visible: 3.8
Max APNIC Region AS path length visible: 19
Number of APNIC region 32-bit ASNs visible in the Routing Table: 1
Number of APNIC addresses announced to Internet: 724941568
Equivalent to 43 /8s, 53 /16s and 187 /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: 158107
Total ARIN prefixes after maximum aggregation: 80236
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 158718
Unique aggregates announced from the ARIN address blocks: 74050
ARIN Region origin ASes present in the Internet Routing Table: 15731
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 6000
ARIN Region transit ASes present in the Internet Routing Table: 1589
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 63
Number of ARIN region 32-bit ASNs visible in the Routing Table: 2
Number of ARIN addresses announced to Internet: 1067680000
Equivalent to 63 /8s, 163 /16s and 129 /24s
Percentage of available ARIN address space announced: 56.5

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: 118845
Total RIPE prefixes after maximum aggregation: 60192
RIPE Deaggregation factor: 1.97
Prefixes being announced from the RIPE address blocks: 122415
Unique aggregates announced from the RIPE address blocks: 78683
RIPE Region origin ASes present in the Internet Routing Table: 17297
RIPE Prefixes per ASN: 7.08
RIPE Region origin ASes announcing only one prefix: 8218
RIPE Region transit ASes present in the Internet Routing Table: 2783
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: 655827968
Equivalent to 39 /8s, 23 /16s and 36 /24s
Percentage of available RIPE address space announced: 95.3

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: 48606
Total LACNIC prefixes after maximum aggregation: 9375
LACNIC Deaggregation factor: 5.18
Prefixes being announced from the LACNIC address blocks: 53051
Unique aggregates announced from the LACNIC address blocks: 25361
LACNIC Region origin ASes present in the Internet Routing Table: 1976
LACNIC Prefixes per ASN: 26.85
LACNIC Region origin ASes announcing only one prefix: 581
LACNIC Region transit ASes present in the Internet Routing Table: 354
Average LACNIC Region AS path length visible: 4.2
Max LACNIC Region AS path length visible: 17
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 2
Number of LACNIC addresses announced to Internet: 133296128
Equivalent to 7 /8s, 241 /16s and 240 /24s
Percentage of available LACNIC address space announced: 79.5

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: 11043
Total AfriNIC prefixes after maximum aggregation: 2528
AfriNIC Deaggregation factor: 4.37
Prefixes being announced from the AfriNIC address blocks: 11636
Unique aggregates announced from the AfriNIC address blocks: 3976
AfriNIC Region origin ASes present in the Internet Routing Table: 644
AfriNIC Prefixes per ASN: 18.07
AfriNIC Region origin ASes announcing only one prefix: 185
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: 46333184
Equivalent to 2 /8s, 194 /16s and 253 /24s
Percentage of available AfriNIC address space announced: 46.0

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 2588 871 92 >>UNKNOWN<<
4766 2112 11553 620 Korea Telecom
7545 1900 320 108 TPG Telecom Limited
4755 1777 394 204 TATA Communications formerly
9829 1525 1221 45 >>UNKNOWN<<
9498 1164 309 72 BHARTI Airtel Ltd.
9583 1155 88 529 >>UNKNOWN<<
7552 1148 1080 13 >>UNKNOWN<<
24560 1085 394 164 >>UNKNOWN<<
4808 1065 2041 312 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 2985 3690 67 BellSouth.net Inc.
18566 2065 382 183 Covad Communications Co.
1785 2001 678 126 >>UNKNOWN<<
22773 1998 2927 124 >>UNKNOWN<<
20115 1669 1622 621 Charter Communications
4323 1617 1134 406 >>UNKNOWN<<
701 1528 11127 797 >>UNKNOWN<<
30036 1344 304 662 >>UNKNOWN<<
7018 1309 11052 832 >>UNKNOWN<<
11492 1224 218 360 >>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 1569 544 16 >>UNKNOWN<<
2118 1385 97 13 >>UNKNOWN<<
34984 1288 241 216 >>UNKNOWN<<
31148 973 43 21 >>UNKNOWN<<
20940 918 319 723 >>UNKNOWN<<
13188 837 98 81 >>UNKNOWN<<
8551 826 370 45 Bezeqint Internet Backbone
6830 809 2376 444 >>UNKNOWN<<
12479 675 789 57 >>UNKNOWN<<
34744 637 170 73 S.C. GVM SISTEM 2003 S.R.L.

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 2945 1591 110 >>UNKNOWN<<
10620 2653 419 229 >>UNKNOWN<<
7303 1733 1155 222 >>UNKNOWN<<
8151 1256 2751 379 >>UNKNOWN<<
18881 1247 844 20 >>UNKNOWN<<
6503 816 434 64 Axtel, S.A.B. de C.V.
27947 803 95 92 Telconet S.A
3816 721 307 87 >>UNKNOWN<<
7738 698 1370 35 >>UNKNOWN<<
11172 623 105 67 >>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 1238 80 4 MOBITEL
24863 881 274 30 >>UNKNOWN<<
6713 542 617 25 Itissalat Al-MAGHRIB
8452 439 956 9 >>UNKNOWN<<
24835 345 80 8 >>UNKNOWN<<
3741 259 922 218 >>UNKNOWN<<
29571 220 17 12 >>UNKNOWN<<
37054 211 11 5 Data Telecom Service
12258 193 28 71 MWEB-12258
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
6389 2985 3690 67 BellSouth.net Inc.
28573 2945 1591 110 >>UNKNOWN<<
10620 2653 419 229 >>UNKNOWN<<
17974 2588 871 92 >>UNKNOWN<<
4766 2112 11553 620 Korea Telecom
18566 2065 382 183 Covad Communications Co.
1785 2001 678 126 >>UNKNOWN<<
22773 1998 2927 124 >>UNKNOWN<<
7545 1900 320 108 TPG Telecom Limited
4755 1777 394 204 TATA Communications formerly

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

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

ASN No of nets Net Savings Description
28573 2945 2835 >>UNKNOWN<<
17974 2588 2496 >>UNKNOWN<<
10620 2653 2424 >>UNKNOWN<<
18566 2065 1882 Covad Communications Co.
1785 2001 1875 >>UNKNOWN<<
22773 1998 1874 >>UNKNOWN<<
7545 1900 1792 TPG Telecom Limited
4755 1777 1573 TATA Communications formerly
8402 1569 1553 >>UNKNOWN<<
7303 1733 1511 >>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
4538 UNALLOCATED 1.51.0.0/16 3320 Deutsche Telekom AG
18403 UNALLOCATED 1.52.0.0/20 3491 Beyond The Network A
18403 UNALLOCATED 1.52.0.0/14 2914 NTT America, Inc.
18403 UNALLOCATED 1.52.16.0/20 3491 Beyond The Network A
18403 UNALLOCATED 1.52.32.0/20 3491 Beyond The Network A
18403 UNALLOCATED 1.52.48.0/20 3491 Beyond The Network A
18403 UNALLOCATED 1.52.64.0/20 3491 Beyond The Network A
18403 UNALLOCATED 1.52.80.0/20 3491 Beyond The Network A
18403 UNALLOCATED 1.52.96.0/20 3491 Beyond The Network A
18403 UNALLOCATED 1.52.112.0/20 3491 Beyond The Network A

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
128.0.0.0/24 2876 >>UNKNOWN<<
128.0.16.0/21 43568 Romerike Bredband AS
128.0.24.0/21 41794 Sibirskie Seti Ltd.
128.0.42.0/24 60619 >>UNKNOWN<<
128.0.43.0/24 60619 >>UNKNOWN<<
128.0.46.0/23 39743 Voxility S.R.L.
128.0.53.0/24 60993 >>UNKNOWN<<
128.0.54.0/24 60972 >>UNKNOWN<<
128.0.55.0/24 48571 efectRO SRL

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

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

Network Origin AS Description
62.61.220.0/24 24974 >>UNKNOWN<<
62.61.221.0/24 24974 >>UNKNOWN<<
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.
64.185.230.0/24 27431 JTL Networks Inc.
64.185.231.0/24 27431 JTL Networks Inc.

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 /11:92 /12:251
/13:477 /14:901 /15:1606 /16:12682 /17:6643 /18:11001
/19:22462 /20:32146 /21:34510 /22:48112 /23:42049 /24:240100
/25:8 /26:11 /27:11 /28:135 /29:204 /30:115
/31:0 /32:135

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications Co.
6389 1715 2985 BellSouth.net Inc.
22773 1300 1998 >>UNKNOWN<<
8402 1269 1569 >>UNKNOWN<<
30036 1211 1344 >>UNKNOWN<<
36998 1206 1238 MOBITEL
11492 1185 1224 >>UNKNOWN<<
1785 1070 2001 >>UNKNOWN<<
6983 1020 1146 ITC^Deltacom
10620 980 2653 >>UNKNOWN<<

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

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

1:818 2:717 3:3 4:16 5:842 6:16
8:564 12:1921 13:2 14:831 15:11 16:3
17:10 20:17 23:296 24:1766 27:1479 31:1327
32:40 33:2 34:5 36:59 37:1888 38:880
39:2 40:176 41:2760 42:229 44:7 46:1947
47:3 49:671 50:759 52:12 54:34 55:6
57:29 58:1081 59:607 60:315 61:1476 62:1137
63:2008 64:4342 65:2153 66:4195 67:2020 68:1088
69:3264 70:797 71:487 72:1912 74:2475 75:324
76:306 77:1110 78:1012 79:608 80:1294 81:1009
82:642 83:580 84:581 85:1203 86:467 87:1023
88:545 89:1816 90:150 91:5550 92:625 93:1757
94:1940 95:1697 96:520 97:343 98:1026 99:40
100:29 101:341 103:2961 105:483 106:139 107:207
108:497 109:1866 110:908 111:1067 112:551 113:815
114:681 115:1035 116:950 117:820 118:1126 119:1270
120:379 121:848 122:1767 123:1230 124:1330 125:1385
128:600 129:202 130:295 131:654 132:353 133:160
134:259 135:68 136:243 137:238 138:340 139:190
140:181 141:313 142:530 143:377 144:510 145:99
146:524 147:392 148:647 149:350 150:148 151:552
152:408 153:189 154:28 155:405 156:263 157:340
158:278 159:657 160:344 161:424 162:489 163:207
164:577 165:499 166:254 167:599 168:1021 169:126
170:1062 171:181 172:23 173:1594 174:551 175:482
176:1122 177:2123 178:1870 179:64 180:1461 181:551
182:1256 183:417 184:668 185:659 186:2316 187:1327
188:1907 189:1288 190:6735 192:6795 193:5849 194:4713
195:3543 196:1361 197:995 198:4485 199:5312 200:5988
201:2221 202:8650 203:8767 204:4432 205:2578 206:2770
207:2782 208:4011 209:3570 210:2801 211:1515 212:2243
213:2007 214:911 215:99 216:5236 217:1616 218:602
219:325 220:1271 221:543 222:319 223:442

End of report
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