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, November 10, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 11 Nov, 2013

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

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

BGP routing table entries examined: 255231
Prefixes after maximum aggregation: 96746
Deaggregation factor: 2.64
Unique aggregates announced to Internet: 117809
Total ASes present in the Internet Routing Table: 29305
Prefixes per ASN: 8.71
Origin-only ASes present in the Internet Routing Table: 22238
Origin ASes announcing only one prefix: 11543
Transit ASes present in the Internet Routing Table: 4517
Transit-only ASes present in the Internet Routing Table: 631
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 35
Max AS path prepend of ASN ( 55644) 31
Prefixes from unregistered ASNs in the Routing Table: 490
Unregistered ASNs in the Routing Table: 116
Number of 32-bit ASNs allocated by the RIRs: 5329
Number of 32-bit ASNs visible in the Routing Table: 2550
Prefixes from 32-bit ASNs in the Routing Table: 6354
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 776
Number of addresses announced to Internet: 2000175460
Equivalent to 119 /8s, 56 /16s and 65 /24s
Percentage of available address space announced: 54.0
Percentage of allocated address space announced: 54.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.1
Total number of prefixes smaller than registry allocations: 109116

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

Prefixes being announced by APNIC Region ASes: 63279
Total APNIC prefixes after maximum aggregation: 16021
APNIC Deaggregation factor: 3.95
Prefixes being announced from the APNIC address blocks: 65252
Unique aggregates announced from the APNIC address blocks: 25278
APNIC Region origin ASes present in the Internet Routing Table: 3034
APNIC Prefixes per ASN: 21.51
APNIC Region origin ASes announcing only one prefix: 842
APNIC Region transit ASes present in the Internet Routing Table: 679
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 35
Number of APNIC region 32-bit ASNs visible in the Routing Table: 651
Number of APNIC addresses announced to Internet: 525171264
Equivalent to 31 /8s, 77 /16s and 122 /24s
Percentage of available APNIC address space announced: 61.4

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 63488-63999, 131072-133631
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: 98279
Total ARIN prefixes after maximum aggregation: 43941
ARIN Deaggregation factor: 2.24
Prefixes being announced from the ARIN address blocks: 99527
Unique aggregates announced from the ARIN address blocks: 40975
ARIN Region origin ASes present in the Internet Routing Table: 10819
ARIN Prefixes per ASN: 9.20
ARIN Region origin ASes announcing only one prefix: 4890
ARIN Region transit ASes present in the Internet Routing Table: 1259
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 20
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 904611328
Equivalent to 53 /8s, 235 /16s and 70 /24s
Percentage of available ARIN address space announced: 47.9

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: 76405
Total RIPE prefixes after maximum aggregation: 34307
RIPE Deaggregation factor: 2.23
Prefixes being announced from the RIPE address blocks: 78850
Unique aggregates announced from the RIPE address blocks: 47255
RIPE Region origin ASes present in the Internet Routing Table: 11435
RIPE Prefixes per ASN: 6.90
RIPE Region origin ASes announcing only one prefix: 5583
RIPE Region transit ASes present in the Internet Routing Table: 2237
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1739
Number of RIPE addresses announced to Internet: 529948420
Equivalent to 31 /8s, 150 /16s and 95 /24s
Percentage of available RIPE address space announced: 77.0

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, 61952-62463, 196608-200191
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: 3102
Total LACNIC prefixes after maximum aggregation: 1095
LACNIC Deaggregation factor: 2.83
Prefixes being announced from the LACNIC address blocks: 3139
Unique aggregates announced from the LACNIC address blocks: 1464
LACNIC Region origin ASes present in the Internet Routing Table: 319
LACNIC Prefixes per ASN: 9.84
LACNIC Region origin ASes announcing only one prefix: 119
LACNIC Region transit ASes present in the Internet Routing Table: 143
Average LACNIC Region AS path length visible: 5.2
Max LACNIC Region AS path length visible: 28
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 140
Number of LACNIC addresses announced to Internet: 9171232
Equivalent to 0 /8s, 139 /16s and 241 /24s
Percentage of available LACNIC address space announced: 5.5

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: 7393
Total AfriNIC prefixes after maximum aggregation: 1297
AfriNIC Deaggregation factor: 5.70
Prefixes being announced from the AfriNIC address blocks: 7687
Unique aggregates announced from the AfriNIC address blocks: 2241
AfriNIC Region origin ASes present in the Internet Routing Table: 452
AfriNIC Prefixes per ASN: 17.01
AfriNIC Region origin ASes announcing only one prefix: 109
AfriNIC Region transit ASes present in the Internet Routing Table: 105
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 3
Number of AfriNIC addresses announced to Internet: 27889408
Equivalent to 1 /8s, 169 /16s and 143 /24s
Percentage of available AfriNIC address space announced: 27.7

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 1606 654 74 PT TELEKOMUNIKASI INDONESIA
7545 1532 225 19 TPG Internet Pty Ltd
9829 1489 1207 33 BSNL National Internet Backbo
4755 1273 311 114 TATA Communications formerly
7552 1114 1072 11 Vietel Corporation
4766 1078 8004 534 Korea Telecom (KIX)
24560 1019 316 128 Bharti Airtel Ltd., Telemedia
45528 734 40 68 Tikona Digital Networks,
4808 717 1578 183 CNCGROUP IP network: China169
9498 688 207 30 BHARTI Airtel Ltd.

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 2519 3217 29 BellSouth.net Inc.
18566 1903 366 141 MegaPath Corporation
22773 1741 2650 62 Cox Communications, Inc.
20115 1621 1643 567 Charter Communications
30036 1304 306 566 Mediacom Communications Corp
11492 1192 202 362 Cable One
701 1164 8965 512 MCI Communications Services,
1785 1044 383 44 PaeTec Communications, Inc.
7011 1024 269 577 Citizens Utilities
22394 1010 5207 291 Cellco Partnership DBA Verizo

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 1992 538 12 OJSC "Vimpelcom"
20940 939 380 681 Akamai Technologies European
34984 806 167 66 TELLCOM ILETISIM HIZMETLERI A
31148 760 34 14 FreeNet ISP
8551 725 342 23 Bezeq International
12479 658 789 49 Uni2 Autonomous System
6849 630 281 17 JSC UKRTELECOM,
13188 519 67 39 TOV "Bank-Inform"
34744 515 158 54 SC GVM SISTEM 2003 SRL
35819 503 542 72 Bayanat Al-Oula For Network S

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
8151 211 193 94 UniNet S.A. de C.V.
23216 164 12 79 RAMtelecom Telecomunicaciones
2708 148 9 49 Universidad de Guanajuato
11172 117 17 7 Servicios Alestra S.A de C.V
18881 116 64 1 Global Village Telecom
6503 115 96 10 AVANTEL, S.A.
7303 102 6 59 Telecom Argentina Stet-France
11340 100 22 45 Red Universitaria Nacional
3449 97 16 1 Universidad Nacional de Bueno
6471 74 28 9 ENTEL CHILE S.A.

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 1332 80 4 Sudanese Mobile Telephone (ZA
24863 607 189 20 LINKdotNET AS number
6713 455 522 18 Itissalat Al-MAGHRIB
8452 285 400 4 TEDATA
24835 197 108 6 RAYA Telecom - Egypt
29975 173 666 17 Vodacom
29571 159 13 6 Ci Telecom Autonomous system
36992 146 197 21 Etisalat MISR
12258 139 14 55 Vodacom Internet Company
15706 136 8 2 Sudatel Internet Exchange Aut

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
6389 2519 3217 29 BellSouth.net Inc.
8402 1992 538 12 OJSC "Vimpelcom"
18566 1903 366 141 MegaPath Corporation
22773 1741 2650 62 Cox Communications, Inc.
20115 1621 1643 567 Charter Communications
17974 1606 654 74 PT TELEKOMUNIKASI INDONESIA
7545 1532 225 19 TPG Internet Pty Ltd
9829 1489 1207 33 BSNL National Internet Backbo
36998 1332 80 4 Sudanese Mobile Telephone (ZA
30036 1304 306 566 Mediacom Communications Corp

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

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

ASN No of nets Net Savings Description
8402 1992 1980 OJSC "Vimpelcom"
18566 1903 1762 MegaPath Corporation
22773 1741 1679 Cox Communications, Inc.
17974 1606 1532 PT TELEKOMUNIKASI INDONESIA
7545 1532 1513 TPG Internet Pty Ltd
9829 1489 1456 BSNL National Internet Backbo
36998 1332 1328 Sudanese Mobile Telephone (ZA
4755 1273 1159 TATA Communications formerly
7552 1114 1103 Vietel Corporation
20115 1621 1054 Charter Communications

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

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

Bad AS Designation Network Transit AS Description
62828 UNALLOCATED 8.21.130.0/24 3356 Level 3 Communicatio
62850 UNALLOCATED 8.25.147.0/24 3356 Level 3 Communicatio
62734 UNALLOCATED 8.31.128.0/24 6939 Hurricane Electric
62773 UNALLOCATED 8.35.180.0/22 3356 Level 3 Communicatio
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
62719 UNALLOCATED 12.27.130.0/24 4323 Time Warner Telecom
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 Communications
17300 UNALLOCATED 12.45.110.0/24 701 MCI Communications S

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.
23.90.192.0/18 3257 Tiscali Intl Network
23.91.0.0/19 40676 Psychz Networks
23.91.4.0/24 40676 Psychz Networks
23.91.14.0/24 40676 Psychz Networks
23.91.32.0/19 36315 Servpac Inc.
23.91.80.0/20 21560 Capital Technology Services G
23.91.96.0/20 37958 ChinaCache Networks ASN
23.91.112.0/21 32475 MidPhase Inc.
23.91.160.0/19 36493 3757277 Canada Inc. (oa 295.c

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 /8:15 /9:10 /10:25 /11:80 /12:218
/13:383 /14:618 /15:1160 /16:9843 /17:4622 /18:7303
/19:12183 /20:20276 /21:21401 /22:26963 /23:23710 /24:125329
/25:354 /26:455 /27:223 /28:21 /29:24 /30:5
/31:0 /32:10

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

ASN No of nets Total ann. Description
18566 1871 1903 MegaPath Corporation
8402 1663 1992 OJSC "Vimpelcom"
6389 1439 2519 BellSouth.net Inc.
36998 1301 1332 Sudanese Mobile Telephone (ZA
30036 1231 1304 Mediacom Communications Corp
22773 1161 1741 Cox Communications, Inc.
11492 1158 1192 Cable One
6983 879 925 ITC^Deltacom
1785 866 1044 PaeTec Communications, Inc.
13977 832 844 FAIRPOINT COMMUNICATIONS, INC

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

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

1:897 2:866 3:3 4:17 5:1022 6:21
8:617 12:1899 13:3 14:897 15:11 16:3
17:18 18:19 20:21 23:541 24:1743 27:1631
31:1493 32:45 33:2 34:5 36:84 37:1917
38:919 39:5 40:181 41:3249 42:265 44:14
46:2025 47:10 49:688 50:844 52:12 54:42
55:4 56:4 57:26 58:1161 59:573 60:375
61:1468 62:1225 63:1989 64:4357 65:2347 66:4150
67:2112 68:1108 69:3302 70:874 71:489 72:2045
74:2562 75:315 76:307 77:1167 78:1053 79:667
80:1300 81:1037 82:631 83:631 84:588 85:1255
86:382 87:1003 88:558 89:1558 90:150 91:5649
92:623 93:1608 94:2039 95:1643 96:509 97:345
98:1049 99:40 100:31 101:627 103:3565 105:527
106:142 107:215 108:537 109:1933 110:970 111:1114
112:592 113:808 114:744 115:1048 116:1001 117:831
118:1171 119:1278 120:337 121:751 122:1873 123:1260
124:1365 125:1438 128:674 129:230 130:333 131:665
132:366 133:157 134:553 135:67 136:279 137:244
138:350 139:177 140:198 141:332 142:542 143:400
144:499 145:88 146:527 147:408 148:774 149:368
150:138 151:587 152:411 153:205 154:51 155:501
156:291 157:419 158:278 159:777 160:360 161:459
162:839 163:226 164:633 165:587 166:259 167:634
168:1042 169:125 170:1120 171:182 172:27 173:1590
174:687 175:516 176:1293 177:396

End of report
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