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, August 4, 2013

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 456044
Prefixes after maximum aggregation: 185078
Deaggregation factor: 2.46
Unique aggregates announced to Internet: 228415
Total ASes present in the Internet Routing Table: 40675
Prefixes per ASN: 11.21
Origin-only ASes present in the Internet Routing Table: 34941
Origin ASes announcing only one prefix: 16228
Transit ASes present in the Internet Routing Table: 5727
Transit-only ASes present in the Internet Routing Table: 136
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: 299005
Unregistered ASNs in the Routing Table: 24513
Number of 32-bit ASNs allocated by the RIRs: 4923
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11431
Special use prefixes present in the Routing Table: 35
Prefixes being announced from unallocated address space: 284
Number of addresses announced to Internet: 2652451072
Equivalent to 158 /8s, 25 /16s and 49 /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: 94.8
Total number of prefixes smaller than registry allocations: 158768

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

Prefixes being announced by APNIC Region ASes: 105712
Total APNIC prefixes after maximum aggregation: 32589
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108062
Unique aggregates announced from the APNIC address blocks: 46100
APNIC Region origin ASes present in the Internet Routing Table: 4823
APNIC Prefixes per ASN: 22.41
APNIC Region origin ASes announcing only one prefix: 1245
APNIC Region transit ASes present in the Internet Routing Table: 799
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: 724331520
Equivalent to 43 /8s, 44 /16s and 108 /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: 158441
Total ARIN prefixes after maximum aggregation: 80199
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159229
Unique aggregates announced from the ARIN address blocks: 74139
ARIN Region origin ASes present in the Internet Routing Table: 15736
ARIN Prefixes per ASN: 10.12
ARIN Region origin ASes announcing only one prefix: 5994
ARIN Region transit ASes present in the Internet Routing Table: 1591
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 20
Number of ARIN region 32-bit ASNs visible in the Routing Table: 2
Number of ARIN addresses announced to Internet: 1067754752
Equivalent to 63 /8s, 164 /16s and 165 /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: 118753
Total RIPE prefixes after maximum aggregation: 60344
RIPE Deaggregation factor: 1.97
Prefixes being announced from the RIPE address blocks: 122408
Unique aggregates announced from the RIPE address blocks: 78462
RIPE Region origin ASes present in the Internet Routing Table: 17314
RIPE Prefixes per ASN: 7.07
RIPE Region origin ASes announcing only one prefix: 8221
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: 656810496
Equivalent to 39 /8s, 38 /16s and 34 /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: 49170
Total LACNIC prefixes after maximum aggregation: 9373
LACNIC Deaggregation factor: 5.25
Prefixes being announced from the LACNIC address blocks: 53653
Unique aggregates announced from the LACNIC address blocks: 25505
LACNIC Region origin ASes present in the Internet Routing Table: 1985
LACNIC Prefixes per ASN: 27.03
LACNIC Region origin ASes announcing only one prefix: 579
LACNIC Region transit ASes present in the Internet Routing Table: 352
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: 134345472
Equivalent to 8 /8s, 1 /16s and 243 /24s
Percentage of available LACNIC address space announced: 80.1

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: 11811
Total AfriNIC prefixes after maximum aggregation: 2533
AfriNIC Deaggregation factor: 4.66
Prefixes being announced from the AfriNIC address blocks: 12407
Unique aggregates announced from the AfriNIC address blocks: 3943
AfriNIC Region origin ASes present in the Internet Routing Table: 647
AfriNIC Prefixes per ASN: 19.18
AfriNIC Region origin ASes announcing only one prefix: 189
AfriNIC Region transit ASes present in the Internet Routing Table: 127
Average AfriNIC Region AS path length visible: 3.3
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: 46597632
Equivalent to 2 /8s, 199 /16s and 6 /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 2649 871 92 >>UNKNOWN<<
4766 2115 11553 618 Korea Telecom
7545 2029 320 111 TPG Telecom Limited
4755 1782 393 201 TATA Communications formerly
9829 1537 1221 45 >>UNKNOWN<<
9583 1221 92 507 >>UNKNOWN<<
9498 1177 309 71 BHARTI Airtel Ltd.
7552 1109 1080 13 >>UNKNOWN<<
24560 1087 394 164 >>UNKNOWN<<
4808 1072 2028 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 2981 3689 63 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
1785 2004 679 124 >>UNKNOWN<<
22773 2001 2927 123 >>UNKNOWN<<
20115 1672 1624 623 Charter Communications
4323 1618 1121 407 >>UNKNOWN<<
701 1521 11104 800 >>UNKNOWN<<
30036 1356 307 653 >>UNKNOWN<<
7018 1327 11069 839 >>UNKNOWN<<
11492 1221 218 363 >>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 1585 544 16 >>UNKNOWN<<
34984 1291 241 215 >>UNKNOWN<<
2118 1155 97 13 >>UNKNOWN<<
31148 977 43 19 >>UNKNOWN<<
20940 943 333 734 >>UNKNOWN<<
6830 849 2371 432 >>UNKNOWN<<
13188 841 98 71 >>UNKNOWN<<
8551 826 370 45 Bezeqint Internet Backbone
12479 678 796 52 >>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 2982 1591 110 >>UNKNOWN<<
10620 2652 421 228 >>UNKNOWN<<
7303 1729 1156 221 >>UNKNOWN<<
18881 1272 844 20 >>UNKNOWN<<
8151 1265 2758 393 >>UNKNOWN<<
6503 814 434 65 Axtel, S.A.B. de C.V.
27947 810 95 92 Telconet S.A
11830 749 364 15 >>UNKNOWN<<
3816 726 303 85 >>UNKNOWN<<
7738 698 1370 35 >>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 542 617 25 Itissalat Al-MAGHRIB
8452 435 956 9 >>UNKNOWN<<
24835 290 80 8 >>UNKNOWN<<
3741 258 921 217 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29571 220 17 12 >>UNKNOWN<<
37054 211 11 5 Data Telecom Service
36992 209 527 22 >>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 2982 1591 110 >>UNKNOWN<<
6389 2981 3689 63 BellSouth.net Inc.
10620 2652 421 228 >>UNKNOWN<<
17974 2649 871 92 >>UNKNOWN<<
4766 2115 11553 618 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2029 320 111 TPG Telecom Limited
1785 2004 679 124 >>UNKNOWN<<
22773 2001 2927 123 >>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 2981 2918 BellSouth.net Inc.
17974 2649 2557 >>UNKNOWN<<
10620 2652 2424 >>UNKNOWN<<
7545 2029 1918 TPG Telecom Limited
18566 2063 1880 Covad Communications Co.
1785 2004 1880 >>UNKNOWN<<
22773 2001 1878 >>UNKNOWN<<
36998 1861 1856 MOBITEL
4755 1782 1581 TATA Communications formerly
8402 1585 1569 >>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
45769 UNALLOCATED 1.186.0.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.1.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.2.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.3.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.4.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.5.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.6.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.7.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.8.0/24 9498 BHARTI Airtel Ltd.
45769 UNALLOCATED 1.186.9.0/24 9498 BHARTI Airtel Ltd.

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 2541 >>UNKNOWN<<
128.0.16.0/21 43568 Romerike Bredband AS
128.0.24.0/21 41794 Sibirskie Seti Ltd.
128.0.40.0/24 60449 >>UNKNOWN<<
128.0.42.0/24 60619 >>UNKNOWN<<
128.0.43.0/24 60619 >>UNKNOWN<<
128.0.45.0/24 60657 >>UNKNOWN<<
128.0.46.0/23 39743 Voxility S.R.L.
128.0.53.0/24 60993 >>UNKNOWN<<

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<<
62.182.96.0/23 15830 >>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.

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 /12:250
/13:478 /14:902 /15:1602 /16:12702 /17:6647 /18:11033
/19:22545 /20:32216 /21:34546 /22:48240 /23:42272 /24:241851
/25:8 /26:11 /27:11 /28:133 /29:198 /30:118
/31:0 /32:130

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

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1826 1861 MOBITEL
6389 1715 2981 BellSouth.net Inc.
22773 1303 2001 >>UNKNOWN<<
8402 1288 1585 >>UNKNOWN<<
30036 1217 1356 >>UNKNOWN<<
11492 1182 1221 >>UNKNOWN<<
1785 1078 2004 >>UNKNOWN<<
6983 1020 1146 ITC^Deltacom
10620 987 2652 >>UNKNOWN<<

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

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

1:820 2:711 3:3 4:16 5:909 6:17
8:573 12:1907 13:2 14:846 15:11 16:3
17:10 18:19 20:17 23:296 24:1767 27:1527
31:1348 32:40 33:2 34:5 36:71 37:1848
38:884 39:2 40:175 41:3373 42:231 44:8
46:1949 47:3 49:662 50:805 52:12 54:37
55:6 57:29 58:1080 59:609 60:329 61:1483
62:1180 63:2002 64:4335 65:2146 66:4186 67:2023
68:1078 69:3274 70:800 71:488 72:1914 74:2508
75:324 76:303 77:1099 78:1038 79:610 80:1286
81:1015 82:640 83:583 84:578 85:1235 86:466
87:1019 88:533 89:1809 90:153 91:5523 92:624
93:1686 94:1937 95:1639 96:592 97:343 98:1027
99:41 100:28 101:342 103:3079 105:523 106:139
107:208 108:500 109:1856 110:937 111:1072 112:565
113:811 114:686 115:1056 116:942 117:790 118:1121
119:1266 120:349 121:850 122:1764 123:1244 124:1336
125:1394 128:602 129:197 130:296 131:659 132:354
133:160 134:261 135:72 136:257 137:241 138:342
139:186 140:172 141:307 142:514 143:393 144:529
145:92 146:523 147:415 148:650 149:349 150:153
151:585 152:411 153:190 154:29 155:419 156:272
157:354 158:276 159:657 160:349 161:429 162:521
163:203 164:577 165:507 166:254 167:597 168:1006
169:125 170:1068 171:188 172:23 173:1557 174:559
175:488 176:1154 177:2120 178:1891 179:72 180:1500
181:598 182:1285 183:418 184:667 185:704 186:2342
187:1390 188:1886 189:1300 190:6814 192:6761 193:5622
194:4716 195:3590 196:1344 197:1066 198:4514 199:5343
200:5953 201:2441 202:8675 203:8808 204:4444 205:2578
206:2716 207:2825 208:3999 209:3588 210:2819 211:1525
212:2272 213:2023 214:901 215:99 216:5214 217:1639
218:606 219:324 220:1270 221:551 222:316 223:460


End of report
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