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 26, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Tue 27 Aug, 2013

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

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

BGP routing table entries examined: 459442
Prefixes after maximum aggregation: 185782
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 230430
Total ASes present in the Internet Routing Table: 40827
Prefixes per ASN: 11.25
Origin-only ASes present in the Internet Routing Table: 35062
Origin ASes announcing only one prefix: 16284
Transit ASes present in the Internet Routing Table: 5758
Transit-only ASes present in the Internet Routing Table: 151
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: 280164
Unregistered ASNs in the Routing Table: 22611
Number of 32-bit ASNs allocated by the RIRs: 4979
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11708
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 335
Number of addresses announced to Internet: 2657843200
Equivalent to 158 /8s, 107 /16s and 120 /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: 160332

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

Prefixes being announced by APNIC Region ASes: 106213
Total APNIC prefixes after maximum aggregation: 32637
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 108709
Unique aggregates announced from the APNIC address blocks: 46382
APNIC Region origin ASes present in the Internet Routing Table: 4835
APNIC Prefixes per ASN: 22.48
APNIC Region origin ASes announcing only one prefix: 1247
APNIC Region transit ASes present in the Internet Routing Table: 805
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: 725624576
Equivalent to 43 /8s, 64 /16s and 39 /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: 159790
Total ARIN prefixes after maximum aggregation: 80399
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 160346
Unique aggregates announced from the ARIN address blocks: 75055
ARIN Region origin ASes present in the Internet Routing Table: 15784
ARIN Prefixes per ASN: 10.16
ARIN Region origin ASes announcing only one prefix: 6014
ARIN Region transit ASes present in the Internet Routing Table: 1620
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: 1070376960
Equivalent to 63 /8s, 204 /16s and 168 /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: 118978
Total RIPE prefixes after maximum aggregation: 60753
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 122828
Unique aggregates announced from the RIPE address blocks: 79033
RIPE Region origin ASes present in the Internet Routing Table: 17371
RIPE Prefixes per ASN: 7.07
RIPE Region origin ASes announcing only one prefix: 8254
RIPE Region transit ASes present in the Internet Routing Table: 2776
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 21
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1
Number of RIPE addresses announced to Internet: 657155584
Equivalent to 39 /8s, 43 /16s and 102 /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: 50286
Total LACNIC prefixes after maximum aggregation: 9411
LACNIC Deaggregation factor: 5.34
Prefixes being announced from the LACNIC address blocks: 54905
Unique aggregates announced from the LACNIC address blocks: 25709
LACNIC Region origin ASes present in the Internet Routing Table: 1994
LACNIC Prefixes per ASN: 27.54
LACNIC Region origin ASes announcing only one prefix: 571
LACNIC Region transit ASes present in the Internet Routing Table: 356
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: 135417600
Equivalent to 8 /8s, 18 /16s and 79 /24s
Percentage of available LACNIC address space announced: 80.7

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: 11725
Total AfriNIC prefixes after maximum aggregation: 2539
AfriNIC Deaggregation factor: 4.62
Prefixes being announced from the AfriNIC address blocks: 12318
Unique aggregates announced from the AfriNIC address blocks: 3936
AfriNIC Region origin ASes present in the Internet Routing Table: 655
AfriNIC Prefixes per ASN: 18.81
AfriNIC Region origin ASes announcing only one prefix: 198
AfriNIC Region transit ASes present in the Internet Routing Table: 130
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: 46545408
Equivalent to 2 /8s, 198 /16s and 58 /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 2662 887 90 >>UNKNOWN<<
4766 2117 11553 622 Korea Telecom
7545 2056 321 112 TPG Telecom Limited
4755 1791 401 192 TATA Communications formerly
9829 1529 1220 44 >>UNKNOWN<<
9583 1225 92 507 Sify Limited
9498 1183 309 71 BHARTI Airtel Ltd.
7552 1128 1080 13 >>UNKNOWN<<
24560 1089 394 160 >>UNKNOWN<<
4808 1067 2022 309 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 2976 3689 62 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
22773 2043 2933 125 >>UNKNOWN<<
1785 2006 679 125 >>UNKNOWN<<
20115 1675 1645 628 Charter Communications
4323 1629 1121 409 >>UNKNOWN<<
701 1521 11103 799 >>UNKNOWN<<
30036 1345 301 645 >>UNKNOWN<<
7018 1322 11309 837 >>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 1511 544 16 >>UNKNOWN<<
34984 1300 241 216 >>UNKNOWN<<
31148 979 43 18 >>UNKNOWN<<
20940 975 353 750 >>UNKNOWN<<
2118 962 97 13 >>UNKNOWN<<
6830 896 2367 429 >>UNKNOWN<<
13188 845 99 71 >>UNKNOWN<<
8551 796 370 41 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 3169 1684 110 >>UNKNOWN<<
10620 2673 425 219 >>UNKNOWN<<
7303 1732 1157 222 >>UNKNOWN<<
18881 1454 844 20 >>UNKNOWN<<
8151 1268 2766 387 >>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 733 374 25 >>UNKNOWN<<
3816 724 303 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 873 274 30 >>UNKNOWN<<
6713 543 633 26 Itissalat Al-MAGHRIB
8452 434 956 9 >>UNKNOWN<<
24835 291 80 8 >>UNKNOWN<<
3741 258 921 217 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
36992 220 501 28 >>UNKNOWN<<
29571 219 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 3169 1684 110 >>UNKNOWN<<
6389 2976 3689 62 BellSouth.net Inc.
10620 2673 425 219 >>UNKNOWN<<
17974 2662 887 90 >>UNKNOWN<<
4766 2117 11553 622 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2056 321 112 TPG Telecom Limited
22773 2043 2933 125 >>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 2976 2914 BellSouth.net Inc.
17974 2662 2572 >>UNKNOWN<<
10620 2673 2454 >>UNKNOWN<<
7545 2056 1944 TPG Telecom Limited
22773 2043 1918 >>UNKNOWN<<
1785 2006 1881 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1861 1856 MOBITEL
4755 1791 1599 TATA Communications formerly
7303 1732 1510 >>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
55633 UNALLOCATED 1.209.184.0/24 4766 Korea Telecom
9684 UNALLOCATED 1.209.204.0/24 4766 Korea Telecom
38132 UNALLOCATED 1.214.16.0/24 9318 Hanaro Telecom Inc.
38132 UNALLOCATED 1.214.17.0/24 9318 Hanaro Telecom Inc.
38132 UNALLOCATED 1.214.18.0/24 9318 Hanaro Telecom Inc.
38132 UNALLOCATED 1.214.19.0/24 9318 Hanaro Telecom Inc.
38132 UNALLOCATED 1.214.20.0/24 9318 Hanaro Telecom Inc.
38132 UNALLOCATED 1.214.21.0/24 9318 Hanaro Telecom Inc.
38132 UNALLOCATED 1.214.22.0/24 9318 Hanaro Telecom Inc.
38132 UNALLOCATED 1.214.23.0/24 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<<
23.91.0.0/19 40676 >>UNKNOWN<<
23.91.32.0/19 36315 >>UNKNOWN<<
23.92.16.0/21 8001 >>UNKNOWN<<
23.92.24.0/22 6939 Hurricane Electric, Inc.
23.92.48.0/20 62471 >>UNKNOWN<<
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<<

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 /15:1616 /16:12720 /17:6668 /18:11022
/19:22672 /20:32336 /21:34817 /22:48555 /23:42503 /24:244124
/25:8 /26:11 /27:11 /28:133 /29:201 /30:127
/31:0 /32:134

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

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1826 1861 MOBITEL
6389 1711 2976 BellSouth.net Inc.
22773 1331 2043 >>UNKNOWN<<
8402 1256 1511 >>UNKNOWN<<
30036 1208 1345 >>UNKNOWN<<
11492 1184 1223 >>UNKNOWN<<
1785 1079 2006 >>UNKNOWN<<
6983 1023 1150 ITC^Deltacom
10620 991 2673 >>UNKNOWN<<

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

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

1:799 2:793 3:3 4:16 5:914 6:18
8:590 12:1895 13:2 14:847 15:11 16:3
17:11 18:19 20:18 23:361 24:1735 27:1551
31:1415 32:40 33:2 34:5 36:72 37:1833
38:893 39:4 40:180 41:3297 42:241 44:9
46:1973 47:5 49:661 50:809 52:12 54:37
55:4 57:29 58:1088 59:647 60:332 61:1471
62:1180 63:1987 64:4552 65:2241 66:4189 67:2077
68:1092 69:3302 70:864 71:493 72:2032 74:2534
75:322 76:306 77:1126 78:1079 79:627 80:1310
81:1020 82:654 83:585 84:577 85:1218 86:486
87:1044 88:538 89:1823 90:158 91:5594 92:642
93:1654 94:2018 95:1552 96:523 97:347 98:1038
99:41 100:28 101:347 103:3177 105:519 106:138
107:209 108:480 109:1862 110:934 111:1105 112:568
113:788 114:688 115:1059 116:959 117:781 118:1123
119:1275 120:353 121:848 122:1787 123:1245 124:1339
125:1414 128:565 129:203 130:299 131:602 132:297
133:160 134:268 135:67 136:266 137:264 138:347
139:186 140:173 141:301 142:533 143:387 144:494
145:94 146:523 147:474 148:668 149:353 150:149
151:560 152:414 153:194 154:30 155:481 156:270
157:354 158:282 159:661 160:352 161:431 162:613
163:203 164:624 165:550 166:255 167:603 168:1021
169:125 170:1079 171:191 172:25 173:1576 174:517
175:482 176:1144 177:2172 178:1905 179:105 180:1519
181:661 182:1220 183:439 184:660 185:780 186:2446
187:1396 188:1880 189:1276 190:6971 192:6882 193:5538
194:4607 195:3599 196:1351 197:1018 198:4566 199:5389
200:5965 201:2604 202:8713 203:8790 204:4464 205:2581
206:2747 207:2832 208:3990 209:3611 210:2820 211:1551
212:2303 213:2037 214:915 215:100 216:5284 217:1660
218:609 219:317 220:1273 221:553 222:322 223:497


End of report
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