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, August 22, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 23 Aug, 2013

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

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

BGP routing table entries examined: 463983
Prefixes after maximum aggregation: 187157
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 230177
Total ASes present in the Internet Routing Table: 44790
Prefixes per ASN: 10.36
Origin-only ASes present in the Internet Routing Table: 35019
Origin ASes announcing only one prefix: 16226
Transit ASes present in the Internet Routing Table: 5906
Transit-only ASes present in the Internet Routing Table: 174
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 19037) 22
Prefixes from unregistered ASNs in the Routing Table: 4678
Unregistered ASNs in the Routing Table: 1548
Number of 32-bit ASNs allocated by the RIRs: 4968
Number of 32-bit ASNs visible in the Routing Table: 3865
Prefixes from 32-bit ASNs in the Routing Table: 11729
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 318
Number of addresses announced to Internet: 2636468300
Equivalent to 157 /8s, 37 /16s and 80 /24s
Percentage of available address space announced: 71.2
Percentage of allocated address space announced: 71.2
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: 162730

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

Prefixes being announced by APNIC Region ASes: 109895
Total APNIC prefixes after maximum aggregation: 33368
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 111737
Unique aggregates announced from the APNIC address blocks: 46424
APNIC Region origin ASes present in the Internet Routing Table: 4873
APNIC Prefixes per ASN: 22.93
APNIC Region origin ASes announcing only one prefix: 1229
APNIC Region transit ASes present in the Internet Routing Table: 823
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 646
Number of APNIC addresses announced to Internet: 726338048
Equivalent to 43 /8s, 75 /16s and 10 /24s
Percentage of available APNIC address space announced: 84.9

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: 161319
Total ARIN prefixes after maximum aggregation: 80975
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 161850
Unique aggregates announced from the ARIN address blocks: 74964
ARIN Region origin ASes present in the Internet Routing Table: 15836
ARIN Prefixes per ASN: 10.22
ARIN Region origin ASes announcing only one prefix: 6009
ARIN Region transit ASes present in the Internet Routing Table: 1670
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 19
Number of ARIN addresses announced to Internet: 1070557440
Equivalent to 63 /8s, 207 /16s and 105 /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: 118629
Total RIPE prefixes after maximum aggregation: 60656
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 122479
Unique aggregates announced from the RIPE address blocks: 78892
RIPE Region origin ASes present in the Internet Routing Table: 17361
RIPE Prefixes per ASN: 7.05
RIPE Region origin ASes announcing only one prefix: 8227
RIPE Region transit ASes present in the Internet Routing Table: 2819
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2390
Number of RIPE addresses announced to Internet: 657114916
Equivalent to 39 /8s, 42 /16s and 199 /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: 50712
Total LACNIC prefixes after maximum aggregation: 9568
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 55393
Unique aggregates announced from the LACNIC address blocks: 25669
LACNIC Region origin ASes present in the Internet Routing Table: 2001
LACNIC Prefixes per ASN: 27.68
LACNIC Region origin ASes announcing only one prefix: 567
LACNIC Region transit ASes present in the Internet Routing Table: 367
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 804
Number of LACNIC addresses announced to Internet: 135434024
Equivalent to 8 /8s, 18 /16s and 143 /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: 11612
Total AfriNIC prefixes after maximum aggregation: 2549
AfriNIC Deaggregation factor: 4.56
Prefixes being announced from the AfriNIC address blocks: 12206
Unique aggregates announced from the AfriNIC address blocks: 3932
AfriNIC Region origin ASes present in the Internet Routing Table: 652
AfriNIC Prefixes per ASN: 18.72
AfriNIC Region origin ASes announcing only one prefix: 194
AfriNIC Region transit ASes present in the Internet Routing Table: 135
Average AfriNIC Region AS path length visible: 4.8
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 46605312
Equivalent to 2 /8s, 199 /16s and 36 /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
4766 2920 11561 919 Korea Telecom (KIX)
17974 2635 869 90 PT TELEKOMUNIKASI INDONESIA
7545 2063 321 113 TPG Internet Pty Ltd
4755 1762 391 189 TATA Communications formerly
9829 1538 1221 45 BSNL National Internet Backbo
4808 1278 2189 356 CNCGROUP IP network: China169
9583 1226 92 505 Sify Limited
9498 1174 309 70 BHARTI Airtel Ltd.
24560 1089 394 160 Bharti Airtel Ltd., Telemedia
7552 1086 1080 13 Vietel Corporation

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

ARIN Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 2977 3689 62 bellsouth.net, inc.
18566 2065 382 184 Covad Communications
22773 2043 2935 128 Cox Communications, Inc.
1785 2006 679 125 PaeTec Communications, Inc.
20115 1674 1645 627 Charter Communications
4323 1621 1105 408 Time Warner Telecom
701 1522 11103 798 UUNET Technologies, Inc.
30036 1346 301 643 Mediacom Communications Corp
7018 1314 11293 829 AT&T WorldNet Services
11492 1223 218 361 Cable One

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

RIPE Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8402 1625 544 16 Corbina telecom
34984 1306 244 223 BILISIM TELEKOM
20940 983 354 755 Akamai Technologies European
31148 979 43 18 FreeNet ISP
2118 962 97 13 EUnet/RELCOM Autonomous Syste
6830 898 2371 429 UPC Distribution Services
13188 845 99 71 Educational Network
8551 746 370 41 Bezeq International
12479 687 797 53 Uni2 Autonomous System
58113 541 55 339 LIR DATACENTER TELECOM SRL

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

LACNIC Region per AS prefix count summary
-----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
28573 3160 1676 105 NET Servicos de Comunicao S.A
10620 2669 425 220 TVCABLE BOGOTA
7303 1732 1157 222 Telecom Argentina Stet-France
18881 1409 844 20 Global Village Telecom
8151 1283 2768 388 UniNet S.A. de C.V.
11830 945 364 15 Instituto Costarricense de El
27947 837 94 91 Telconet S.A
6503 787 434 63 AVANTEL, S.A.
6147 739 374 25 Telefonica Del Peru
3816 721 302 83 Empresa Nacional de Telecomun

Complete listing at http://thyme.rand.apnic.net/current/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 LINKdotNET AS number
6713 543 633 26 Itissalat Al-MAGHRIB
8452 416 956 9 TEDATA
24835 291 80 8 RAYA Telecom - Egypt
3741 258 921 217 The Internet Solution
15706 221 32 6 Sudatel Internet Exchange Aut
29571 220 17 12 Ci Telecom Autonomous system
36992 220 501 29 Etisalat MISR
12258 193 28 71 Vodacom Internet Company

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

Global Per AS prefix count summary
----------------------------------

ASN No of nets /20 equiv MaxAgg Description
28573 3160 1676 105 NET Servicos de Comunicao S.A
6389 2977 3689 62 bellsouth.net, inc.
4766 2920 11561 919 Korea Telecom (KIX)
10620 2669 425 220 TVCABLE BOGOTA
17974 2635 869 90 PT TELEKOMUNIKASI INDONESIA
18566 2065 382 184 Covad Communications
7545 2063 321 113 TPG Internet Pty Ltd
22773 2043 2935 128 Cox Communications, Inc.
1785 2006 679 125 PaeTec Communications, Inc.
36998 1861 112 5 MOBITEL

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

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

ASN No of nets Net Savings Description
6389 2977 2915 bellsouth.net, inc.
17974 2635 2545 PT TELEKOMUNIKASI INDONESIA
10620 2669 2449 TVCABLE BOGOTA
4766 2920 2001 Korea Telecom (KIX)
7545 2063 1950 TPG Internet Pty Ltd
22773 2043 1915 Cox Communications, Inc.
18566 2065 1881 Covad Communications
1785 2006 1881 PaeTec Communications, Inc.
36998 1861 1856 MOBITEL
8402 1625 1609 Corbina telecom

Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.103.0/24 209 Qwest
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks
30621 UNALLOCATED 12.151.74.0/23 7018 AT&T WorldNet Servic

Complete listing at http://thyme.rand.apnic.net/current/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
100.100.0.0/24 4847 China Networks Inter-Exchange

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

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

Network Origin AS Description
23.90.128.0/18 27418 OUTOFWALL INC.
23.91.0.0/19 40676 Psychz Networks
23.92.16.0/21 8001 Net Access Corporation
23.92.24.0/22 6939 Hurricane Electric
23.92.64.0/24 54540 Incero LLC
23.92.65.0/24 54540 Incero LLC
23.92.66.0/24 54540 Incero LLC
23.92.67.0/24 54540 Incero LLC
23.92.68.0/24 54540 Incero LLC
23.92.69.0/24 54540 Incero LLC

Complete listing at http://thyme.rand.apnic.net/current/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 /8:16 /9:11 /10:30 /11:93 /12:250
/13:480 /14:906 /15:1615 /16:12748 /17:6663 /18:11055
/19:22690 /20:32260 /21:34903 /22:48969 /23:42889 /24:245900
/25:870 /26:1002 /27:477 /28:44 /29:75 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications
36998 1826 1861 MOBITEL
6389 1712 2977 bellsouth.net, inc.
8402 1365 1625 Corbina telecom
22773 1331 2043 Cox Communications, Inc.
30036 1209 1346 Mediacom Communications Corp
11492 1184 1223 Cable One
1785 1079 2006 PaeTec Communications, Inc.
6983 1023 1151 ITC^Deltacom
10620 990 2669 TVCABLE BOGOTA

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

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

1:800 2:748 3:3 4:19 5:914 6:17
8:587 12:1895 13:2 14:870 15:11 16:3
17:11 18:19 20:17 23:349 24:1738 27:1547
31:1409 32:45 33:2 34:5 36:70 37:1828
38:899 39:2 40:180 41:3246 42:243 44:9
46:1981 47:3 49:657 50:842 52:12 54:37
55:6 57:26 58:1172 59:616 60:332 61:1399
62:1176 63:1999 64:4557 65:2249 66:4218 67:2074
68:1094 69:3304 70:864 71:495 72:1987 74:2533
75:325 76:307 77:1145 78:1123 79:622 80:1308
81:1021 82:648 83:584 84:571 85:1219 86:482
87:1052 88:538 89:1819 90:158 91:5581 92:637
93:1660 94:2022 95:1555 96:587 97:347 98:1040
99:44 100:29 101:597 103:3170 105:519 106:138
107:209 108:497 109:1865 110:941 111:1104 112:571
113:801 114:730 115:1031 116:966 117:806 118:1121
119:1289 120:362 121:741 122:1862 123:1245 124:1369
125:1408 128:604 129:223 130:310 131:671 132:349
133:160 134:278 135:67 136:267 137:268 138:345
139:189 140:200 141:323 142:537 143:393 144:498
145:95 146:530 147:482 148:676 149:350 150:150
151:560 152:416 153:194 154:30 155:485 156:273
157:405 158:277 159:747 160:351 161:455 162:604
163:221 164:613 165:567 166:255 167:603 168:1033
169:126 170:1076 171:191 172:25 173:1570 174:513
175:495 176:1189 177:2162 178:1909 179:99 180:1521
181:660 182:1226 183:441 184:663 185:766 186:2454
187:1406 188:1894 189:1278 190:7019 192:6929 193:5535
194:4606 195:3601 196:1336 197:1013 198:4610 199:5402
200:5995 201:2606 202:8877 203:8889 204:4522 205:2614
206:2835 207:2918 208:4002 209:3635 210:2910 211:1557
212:2261 213:2054 214:929 215:100 216:5307 217:1648
218:619 219:304 220:1279 221:553 222:324 223:506


End of report
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