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, August 19, 2013

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 458271
Prefixes after maximum aggregation: 185528
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 229361
Total ASes present in the Internet Routing Table: 40755
Prefixes per ASN: 11.24
Origin-only ASes present in the Internet Routing Table: 34989
Origin ASes announcing only one prefix: 16218
Transit ASes present in the Internet Routing Table: 5759
Transit-only ASes present in the Internet Routing Table: 149
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: 287791
Unregistered ASNs in the Routing Table: 23361
Number of 32-bit ASNs allocated by the RIRs: 4961
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11687
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 309
Number of addresses announced to Internet: 2656421888
Equivalent to 158 /8s, 85 /16s and 200 /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: 159835

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

Prefixes being announced by APNIC Region ASes: 105993
Total APNIC prefixes after maximum aggregation: 32656
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 108443
Unique aggregates announced from the APNIC address blocks: 46124
APNIC Region origin ASes present in the Internet Routing Table: 4834
APNIC Prefixes per ASN: 22.43
APNIC Region origin ASes announcing only one prefix: 1250
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: 19
Number of APNIC region 32-bit ASNs visible in the Routing Table: 1
Number of APNIC addresses announced to Internet: 724896256
Equivalent to 43 /8s, 53 /16s and 10 /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: 159337
Total ARIN prefixes after maximum aggregation: 80419
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159932
Unique aggregates announced from the ARIN address blocks: 74738
ARIN Region origin ASes present in the Internet Routing Table: 15767
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5988
ARIN Region transit ASes present in the Internet Routing Table: 1608
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: 1070226432
Equivalent to 63 /8s, 202 /16s and 92 /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: 118849
Total RIPE prefixes after maximum aggregation: 60457
RIPE Deaggregation factor: 1.97
Prefixes being announced from the RIPE address blocks: 122688
Unique aggregates announced from the RIPE address blocks: 78654
RIPE Region origin ASes present in the Internet Routing Table: 17328
RIPE Prefixes per ASN: 7.08
RIPE Region origin ASes announcing only one prefix: 8211
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: 657003264
Equivalent to 39 /8s, 41 /16s and 19 /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: 49974
Total LACNIC prefixes after maximum aggregation: 9418
LACNIC Deaggregation factor: 5.31
Prefixes being announced from the LACNIC address blocks: 54610
Unique aggregates announced from the LACNIC address blocks: 25626
LACNIC Region origin ASes present in the Internet Routing Table: 1988
LACNIC Prefixes per ASN: 27.47
LACNIC Region origin ASes announcing only one prefix: 574
LACNIC Region transit ASes present in the Internet Routing Table: 351
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: 135146496
Equivalent to 8 /8s, 14 /16s and 44 /24s
Percentage of available LACNIC address space announced: 80.6

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: 11695
Total AfriNIC prefixes after maximum aggregation: 2537
AfriNIC Deaggregation factor: 4.61
Prefixes being announced from the AfriNIC address blocks: 12288
Unique aggregates announced from the AfriNIC address blocks: 3929
AfriNIC Region origin ASes present in the Internet Routing Table: 654
AfriNIC Prefixes per ASN: 18.79
AfriNIC Region origin ASes announcing only one prefix: 195
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: 46520832
Equivalent to 2 /8s, 197 /16s and 218 /24s
Percentage of available AfriNIC address space announced: 46.2

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 2049 320 111 TPG Telecom Limited
4755 1790 401 193 TATA Communications formerly
9829 1538 1221 45 >>UNKNOWN<<
9583 1222 92 507 Sify Limited
9498 1178 309 72 BHARTI Airtel Ltd.
7552 1128 1080 13 >>UNKNOWN<<
24560 1088 394 164 >>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 2041 2935 127 >>UNKNOWN<<
1785 2006 679 125 >>UNKNOWN<<
20115 1675 1646 621 Charter Communications
4323 1634 1122 411 >>UNKNOWN<<
701 1520 11103 798 >>UNKNOWN<<
30036 1353 303 646 >>UNKNOWN<<
7018 1323 11326 839 >>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 1616 544 16 >>UNKNOWN<<
34984 1295 241 215 >>UNKNOWN<<
31148 979 43 18 >>UNKNOWN<<
20940 974 351 746 >>UNKNOWN<<
2118 962 97 13 >>UNKNOWN<<
6830 899 2371 430 >>UNKNOWN<<
13188 843 99 70 >>UNKNOWN<<
8551 811 370 45 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 3136 1671 109 >>UNKNOWN<<
10620 2668 424 223 >>UNKNOWN<<
7303 1730 1157 220 >>UNKNOWN<<
18881 1332 844 20 >>UNKNOWN<<
8151 1266 2762 388 >>UNKNOWN<<
11830 945 364 15 >>UNKNOWN<<
27947 810 95 92 Telconet S.A
6503 784 434 65 Axtel, S.A.B. de C.V.
6147 736 374 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 875 274 30 >>UNKNOWN<<
6713 543 633 26 Itissalat Al-MAGHRIB
8452 438 956 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 3136 1671 109 >>UNKNOWN<<
6389 2978 3689 62 BellSouth.net Inc.
10620 2668 424 223 >>UNKNOWN<<
17974 2656 871 92 >>UNKNOWN<<
4766 2115 11553 620 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2049 320 111 TPG Telecom Limited
22773 2041 2935 127 >>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 2668 2445 >>UNKNOWN<<
7545 2049 1938 TPG Telecom Limited
22773 2041 1914 >>UNKNOWN<<
1785 2006 1881 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1861 1856 MOBITEL
8402 1616 1600 >>UNKNOWN<<
4755 1790 1597 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
45991 UNALLOCATED 1.201.7.0/24 2914 NTT America, Inc.
9286 UNALLOCATED 1.201.64.0/18 9957 >>UNKNOWN<<
9286 UNALLOCATED 1.201.128.0/18 9957 >>UNKNOWN<<
9286 UNALLOCATED 1.201.192.0/18 9957 >>UNKNOWN<<
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

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<<
23.92.16.0/21 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<<
23.92.70.0/24 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 /15:1612 /16:12720 /17:6647 /18:10984
/19:22651 /20:32338 /21:34783 /22:48430 /23:42436 /24:243270
/25:8 /26:11 /27:11 /28:131 /29:205 /30:119
/31:0 /32:131

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 1330 2041 >>UNKNOWN<<
8402 1328 1616 >>UNKNOWN<<
30036 1215 1353 >>UNKNOWN<<
11492 1184 1223 >>UNKNOWN<<
1785 1079 2006 >>UNKNOWN<<
6983 1024 1151 ITC^Deltacom
10620 990 2668 >>UNKNOWN<<

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

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

1:803 2:793 3:3 4:16 5:913 6:17
8:588 12:1897 13:2 14:841 15:11 16:3
17:10 18:19 20:17 23:337 24:1736 27:1546
31:1390 32:40 33:2 34:5 36:70 37:1825
38:895 39:2 40:180 41:3291 42:236 44:9
46:1956 47:4 49:660 50:809 52:12 54:37
55:6 57:29 58:1094 59:640 60:329 61:1478
62:1181 63:1980 64:4545 65:2150 66:4197 67:2065
68:1091 69:3302 70:863 71:490 72:1920 74:2527
75:325 76:305 77:1105 78:1022 79:613 80:1310
81:1021 82:657 83:580 84:568 85:1220 86:475
87:1053 88:537 89:1824 90:158 91:5572 92:623
93:1665 94:2017 95:1587 96:587 97:346 98:1026
99:40 100:28 101:348 103:3145 105:519 106:139
107:210 108:475 109:1861 110:900 111:1095 112:570
113:801 114:698 115:1064 116:948 117:786 118:1127
119:1269 120:349 121:849 122:1725 123:1245 124:1334
125:1410 128:597 129:204 130:297 131:659 132:339
133:160 134:265 135:72 136:258 137:237 138:344
139:187 140:173 141:309 142:520 143:389 144:498
145:95 146:525 147:476 148:660 149:352 150:152
151:558 152:410 153:193 154:30 155:418 156:269
157:356 158:276 159:655 160:350 161:427 162:581
163:203 164:624 165:550 166:255 167:602 168:1025
169:125 170:1074 171:188 172:25 173:1571 174:567
175:479 176:1183 177:2152 178:1902 179:94 180:1513
181:641 182:1214 183:432 184:658 185:755 186:2450
187:1395 188:1875 189:1281 190:6973 192:6817 193:5539
194:4609 195:3593 196:1347 197:1020 198:4538 199:5351
200:5965 201:2597 202:8683 203:8786 204:4443 205:2591
206:2745 207:2856 208:3989 209:3574 210:2798 211:1551
212:2295 213:2016 214:921 215:100 216:5250 217:1650
218:608 219:317 220:1274 221:552 222:320 223:485


End of report
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