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, July 4, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 05 Jul, 2013

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

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

BGP routing table entries examined: 451616
Prefixes after maximum aggregation: 184074
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 227039
Total ASes present in the Internet Routing Table: 40514
Prefixes per ASN: 11.15
Origin-only ASes present in the Internet Routing Table: 34781
Origin ASes announcing only one prefix: 16186
Transit ASes present in the Internet Routing Table: 5725
Transit-only ASes present in the Internet Routing Table: 130
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: 348521
Unregistered ASNs in the Routing Table: 28778
Number of 32-bit ASNs allocated by the RIRs: 4847
Number of 32-bit ASNs visible in the Routing Table: 8
Prefixes from 32-bit ASNs in the Routing Table: 11052
Special use prefixes present in the Routing Table: 32
Prefixes being announced from unallocated address space: 237
Number of addresses announced to Internet: 2648217600
Equivalent to 157 /8s, 216 /16s and 152 /24s
Percentage of available address space announced: 71.5
Percentage of allocated address space announced: 71.5
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: 156647

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

Prefixes being announced by APNIC Region ASes: 104737
Total APNIC prefixes after maximum aggregation: 32319
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 107218
Unique aggregates announced from the APNIC address blocks: 45679
APNIC Region origin ASes present in the Internet Routing Table: 4815
APNIC Prefixes per ASN: 22.27
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 800
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: 724245760
Equivalent to 43 /8s, 43 /16s and 29 /24s
Percentage of available APNIC address space announced: 84.6

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: 157530
Total ARIN prefixes after maximum aggregation: 79875
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 158221
Unique aggregates announced from the ARIN address blocks: 73787
ARIN Region origin ASes present in the Internet Routing Table: 15688
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 5988
ARIN Region transit ASes present in the Internet Routing Table: 1582
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 19
Number of ARIN region 32-bit ASNs visible in the Routing Table: 2
Number of ARIN addresses announced to Internet: 1065335552
Equivalent to 63 /8s, 127 /16s and 187 /24s
Percentage of available ARIN address space announced: 56.4

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: 118006
Total RIPE prefixes after maximum aggregation: 60092
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 121462
Unique aggregates announced from the RIPE address blocks: 78496
RIPE Region origin ASes present in the Internet Routing Table: 17240
RIPE Prefixes per ASN: 7.05
RIPE Region origin ASes announcing only one prefix: 8186
RIPE Region transit ASes present in the Internet Routing Table: 2790
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: 656641536
Equivalent to 39 /8s, 35 /16s and 142 /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: 48453
Total LACNIC prefixes after maximum aggregation: 9219
LACNIC Deaggregation factor: 5.26
Prefixes being announced from the LACNIC address blocks: 52774
Unique aggregates announced from the LACNIC address blocks: 24877
LACNIC Region origin ASes present in the Internet Routing Table: 1962
LACNIC Prefixes per ASN: 26.90
LACNIC Region origin ASes announcing only one prefix: 585
LACNIC Region transit ASes present in the Internet Routing Table: 349
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: 3
Number of LACNIC addresses announced to Internet: 133076224
Equivalent to 7 /8s, 238 /16s and 149 /24s
Percentage of available LACNIC address space announced: 79.3

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: 11106
Total AfriNIC prefixes after maximum aggregation: 2526
AfriNIC Deaggregation factor: 4.40
Prefixes being announced from the AfriNIC address blocks: 11703
Unique aggregates announced from the AfriNIC address blocks: 3979
AfriNIC Region origin ASes present in the Internet Routing Table: 641
AfriNIC Prefixes per ASN: 18.26
AfriNIC Region origin ASes announcing only one prefix: 186
AfriNIC Region transit ASes present in the Internet Routing Table: 133
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: 46336256
Equivalent to 2 /8s, 195 /16s and 9 /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 2567 855 92 >>UNKNOWN<<
4766 2127 11553 623 Korea Telecom
7545 2017 320 105 TPG Telecom Limited
4755 1779 394 204 >>UNKNOWN<<
9829 1505 1205 40 >>UNKNOWN<<
9583 1460 117 565 >>UNKNOWN<<
7552 1148 1080 13 >>UNKNOWN<<
9498 1138 309 72 BHARTI Airtel Ltd.
24560 1080 394 164 >>UNKNOWN<<
4808 1071 2041 313 >>UNKNOWN<<

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 2989 3690 68 BellSouth.net Inc.
18566 2064 382 183 Covad Communications Co.
1785 1995 678 126 >>UNKNOWN<<
22773 1988 2927 123 >>UNKNOWN<<
20115 1667 1618 620 Charter Communications
4323 1623 1154 404 >>UNKNOWN<<
701 1528 11127 797 >>UNKNOWN<<
30036 1337 300 664 >>UNKNOWN<<
7018 1302 11052 829 >>UNKNOWN<<
11492 1222 218 359 >>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 1598 544 16 >>UNKNOWN<<
34984 1272 241 216 >>UNKNOWN<<
2118 1271 97 13 >>UNKNOWN<<
20940 889 315 705 >>UNKNOWN<<
8551 827 370 45 Bezeqint Internet Backbone
13188 825 98 79 >>UNKNOWN<<
31148 808 40 25 >>UNKNOWN<<
6830 782 2375 439 >>UNKNOWN<<
12479 673 789 57 >>UNKNOWN<<
34744 656 171 76 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 2918 1576 107 >>UNKNOWN<<
10620 2682 421 193 >>UNKNOWN<<
7303 1732 1155 221 >>UNKNOWN<<
8151 1256 2743 382 >>UNKNOWN<<
18881 1092 844 20 >>UNKNOWN<<
6503 863 434 65 Axtel, S.A.B. de C.V.
27947 798 95 94 >>UNKNOWN<<
3816 721 307 87 >>UNKNOWN<<
7738 698 1370 35 >>UNKNOWN<<
11172 619 104 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 1265 80 4 MOBITEL
24863 883 274 30 >>UNKNOWN<<
6713 542 617 25 Itissalat Al-MAGHRIB
8452 461 956 9 >>UNKNOWN<<
24835 345 80 8 >>UNKNOWN<<
3741 259 922 218 >>UNKNOWN<<
15706 222 32 6 >>UNKNOWN<<
29571 218 17 15 >>UNKNOWN<<
36992 203 527 21 >>UNKNOWN<<
12258 193 28 66 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
6389 2989 3690 68 BellSouth.net Inc.
28573 2918 1576 107 >>UNKNOWN<<
10620 2682 421 193 >>UNKNOWN<<
17974 2567 855 92 >>UNKNOWN<<
4766 2127 11553 623 Korea Telecom
18566 2064 382 183 Covad Communications Co.
7545 2017 320 105 TPG Telecom Limited
1785 1995 678 126 >>UNKNOWN<<
22773 1988 2927 123 >>UNKNOWN<<
4755 1779 394 204 >>UNKNOWN<<

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 2918 2811 >>UNKNOWN<<
10620 2682 2489 >>UNKNOWN<<
17974 2567 2475 >>UNKNOWN<<
7545 2017 1912 TPG Telecom Limited
18566 2064 1881 Covad Communications Co.
1785 1995 1869 >>UNKNOWN<<
22773 1988 1865 >>UNKNOWN<<
8402 1598 1582 >>UNKNOWN<<
4755 1779 1575 >>UNKNOWN<<
7303 1732 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
45528 UNALLOCATED 1.22.6.0/24 9498 BHARTI Airtel Ltd.
45528 UNALLOCATED 1.22.8.0/24 4755 >>UNKNOWN<<
45528 UNALLOCATED 1.22.8.0/23 9498 BHARTI Airtel Ltd.
45528 UNALLOCATED 1.22.9.0/24 4755 >>UNKNOWN<<
45528 UNALLOCATED 1.22.10.0/24 4755 >>UNKNOWN<<
45528 UNALLOCATED 1.22.10.0/23 9498 BHARTI Airtel Ltd.
45528 UNALLOCATED 1.22.11.0/24 4755 >>UNKNOWN<<
45528 UNALLOCATED 1.22.14.0/24 4755 >>UNKNOWN<<
45528 UNALLOCATED 1.22.14.0/23 9498 BHARTI Airtel Ltd.
45528 UNALLOCATED 1.22.15.0/24 4755 >>UNKNOWN<<

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
/13:480 /14:897 /15:1602 /16:12675 /17:6642 /18:11039
/19:22458 /20:32092 /21:34364 /22:47651 /23:41985 /24:238723
/25:7 /26:10 /27:11 /28:132 /29:199 /30:113
/31:0 /32:134

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

ASN No of nets Total ann. Description
18566 2015 2064 Covad Communications Co.
6389 1717 2989 BellSouth.net Inc.
8402 1308 1598 >>UNKNOWN<<
22773 1293 1988 >>UNKNOWN<<
36998 1233 1265 MOBITEL
30036 1205 1337 >>UNKNOWN<<
11492 1183 1222 >>UNKNOWN<<
1785 1063 1995 >>UNKNOWN<<
6983 1015 1145 ITC^Deltacom
10620 998 2682 >>UNKNOWN<<

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

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

1:803 2:750 3:3 4:16 5:811 6:16
8:556 12:1920 13:3 14:840 15:11 16:3
17:10 20:17 23:289 24:1766 27:1475 31:1265
32:40 33:2 34:5 36:52 37:1870 38:873
39:2 40:171 41:2820 42:208 44:7 46:1905
47:3 49:661 50:735 52:12 54:35 55:5
57:31 58:1075 59:612 60:323 61:1468 62:1136
63:2008 64:4324 65:2158 66:4167 67:2035 68:1076
69:3267 70:835 71:489 72:1928 74:2460 75:324
76:307 77:1090 78:1004 79:618 80:1270 81:1020
82:633 83:594 84:587 85:1179 86:449 87:1011
88:538 89:1753 90:149 91:5514 92:606 93:1762
94:1895 95:1616 96:523 97:344 98:1013 99:39
100:29 101:323 103:2898 105:519 106:136 107:206
108:494 109:1843 110:898 111:1056 112:546 113:814
114:675 115:1038 116:943 117:784 118:1085 119:1263
120:380 121:844 122:1756 123:1217 124:1341 125:1378
128:593 129:203 130:288 131:656 132:353 133:155
134:260 135:68 136:222 137:238 138:340 139:187
140:184 141:313 142:522 143:375 144:480 145:94
146:506 147:378 148:657 149:348 150:145 151:520
152:415 153:189 154:24 155:411 156:262 157:351
158:279 159:632 160:344 161:425 162:478 163:202
164:597 165:492 166:254 167:595 168:1039 169:128
170:1053 171:180 172:21 173:1590 174:550 175:459
176:1106 177:2133 178:1858 179:52 180:1457 181:490
182:1249 183:419 184:668 185:607 186:2302 187:1292
188:2050 189:1287 190:6733 192:6745 193:5842 194:4622
195:3456 196:1357 197:948 198:4452 199:5306 200:5975
201:2205 202:8639 203:8782 204:4434 205:2531 206:2712
207:2778 208:4011 209:3593 210:2819 211:1512 212:2226
213:1986 214:902 215:99 216:5233 217:1618 218:601
219:328 220:1276 221:557 222:319 223:445

End of report
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