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.

Saturday, December 21, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 22 Dec, 2013

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

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

BGP routing table entries examined: 165024
Prefixes after maximum aggregation: 66151
Deaggregation factor: 2.49
Unique aggregates announced to Internet: 77433
Total ASes present in the Internet Routing Table: 24009
Prefixes per ASN: 6.87
Origin-only ASes present in the Internet Routing Table: 18005
Origin ASes announcing only one prefix: 10160
Transit ASes present in the Internet Routing Table: 3926
Transit-only ASes present in the Internet Routing Table: 744
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 38
Max AS path prepend of ASN ( 55644) 31
Prefixes from unregistered ASNs in the Routing Table: 516
Unregistered ASNs in the Routing Table: 100
Number of 32-bit ASNs allocated by the RIRs: 5575
Number of 32-bit ASNs visible in the Routing Table: 2078
Prefixes from 32-bit ASNs in the Routing Table: 4430
Number of bogon 32-bit ASNs visible in the Routing Table: 0
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 549
Number of addresses announced to Internet: 1172673412
Equivalent to 69 /8s, 229 /16s and 147 /24s
Percentage of available address space announced: 31.7
Percentage of allocated address space announced: 31.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.3
Total number of prefixes smaller than registry allocations: 98471

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

Prefixes being announced by APNIC Region ASes: 21856
Total APNIC prefixes after maximum aggregation: 5696
APNIC Deaggregation factor: 3.84
Prefixes being announced from the APNIC address blocks: 22830
Unique aggregates announced from the APNIC address blocks: 9344
APNIC Region origin ASes present in the Internet Routing Table: 1758
APNIC Prefixes per ASN: 12.99
APNIC Region origin ASes announcing only one prefix: 564
APNIC Region transit ASes present in the Internet Routing Table: 531
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 38
Number of APNIC region 32-bit ASNs visible in the Routing Table: 530
Number of APNIC addresses announced to Internet: 164454656
Equivalent to 9 /8s, 205 /16s and 97 /24s
Percentage of available APNIC address space announced: 19.2

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: 67779
Total ARIN prefixes after maximum aggregation: 30231
ARIN Deaggregation factor: 2.24
Prefixes being announced from the ARIN address blocks: 68881
Unique aggregates announced from the ARIN address blocks: 26200
ARIN Region origin ASes present in the Internet Routing Table: 8424
ARIN Prefixes per ASN: 8.18
ARIN Region origin ASes announcing only one prefix: 4242
ARIN Region transit ASes present in the Internet Routing Table: 1044
Average ARIN Region AS path length visible: 3.9
Max ARIN Region AS path length visible: 21
Number of ARIN region 32-bit ASNs visible in the Routing Table: 18
Number of ARIN addresses announced to Internet: 593242624
Equivalent to 35 /8s, 92 /16s and 42 /24s
Percentage of available ARIN address space announced: 31.4

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: 64086
Total RIPE prefixes after maximum aggregation: 28828
RIPE Deaggregation factor: 2.22
Prefixes being announced from the RIPE address blocks: 66321
Unique aggregates announced from the RIPE address blocks: 39505
RIPE Region origin ASes present in the Internet Routing Table: 10432
RIPE Prefixes per ASN: 6.36
RIPE Region origin ASes announcing only one prefix: 5222
RIPE Region transit ASes present in the Internet Routing Table: 2104
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: 1517
Number of RIPE addresses announced to Internet: 396271492
Equivalent to 23 /8s, 158 /16s and 159 /24s
Percentage of available RIPE address space announced: 57.6

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: 327
Total LACNIC prefixes after maximum aggregation: 233
LACNIC Deaggregation factor: 1.40
Prefixes being announced from the LACNIC address blocks: 34
Unique aggregates announced from the LACNIC address blocks: 22
LACNIC Region origin ASes present in the Internet Routing Table: 82
LACNIC Prefixes per ASN: 0.41
LACNIC Region origin ASes announcing only one prefix: 31
LACNIC Region transit ASes present in the Internet Routing Table: 36
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 10
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 10
Number of LACNIC addresses announced to Internet: 131072
Equivalent to 0 /8s, 2 /16s and 0 /24s
Percentage of available LACNIC address space announced: 0.1

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: 6083
Total AfriNIC prefixes after maximum aggregation: 1054
AfriNIC Deaggregation factor: 5.77
Prefixes being announced from the AfriNIC address blocks: 6409
Unique aggregates announced from the AfriNIC address blocks: 1979
AfriNIC Region origin ASes present in the Internet Routing Table: 431
AfriNIC Prefixes per ASN: 14.87
AfriNIC Region origin ASes announcing only one prefix: 101
AfriNIC Region transit ASes present in the Internet Routing Table: 106
Average AfriNIC Region AS path length visible: 4.6
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: 16419072
Equivalent to 0 /8s, 250 /16s and 137 /24s
Percentage of available AfriNIC address space announced: 16.3

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
7545 1016 154 12 TPG Internet Pty Ltd
17974 613 428 10 PT TELEKOMUNIKASI INDONESIA
45528 425 24 52 Tikona Digital Networks,
4755 423 118 31 TATA Communications formerly
17623 349 59 6 China Netcom Corp.
9829 332 259 8 BSNL National Internet Backbo
4766 321 2928 108 Korea Telecom (KIX)
18403 302 226 8 The Corporation for Financing
38511 302 16 2 Indonesia Network Information
17488 273 62 70 Hathway IP Over Cable Interne

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 2385 2944 18 BellSouth.net Inc.
18566 1898 366 142 MegaPath Corporation
22773 1625 2377 46 Cox Communications, Inc.
20115 1601 1616 535 Charter Communications
11492 1030 144 407 Cable One
1785 1027 353 35 PaeTec Communications, Inc.
13977 845 62 135 FAIRPOINT COMMUNICATIONS, INC
6983 781 263 274 ITC^Deltacom
7011 775 227 497 Citizens Utilities
22561 738 227 123 Digital Teleport, Inc

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 1366 378 9 OJSC "Vimpelcom"
20940 938 396 673 Akamai Technologies European
12479 665 790 45 Uni2 Autonomous System
8551 639 278 19 Bezeq International
6849 627 281 17 JSC UKRTELECOM,
34744 500 147 46 S.C. GVM SISTEM 2003 S.R.L.
34984 427 71 60 TELLCOM ILETISIM HIZMETLERI A
35228 404 166 14 Avatar Broadband Limited
35819 391 405 57 Bayanat Al-Oula For Network S
8866 380 125 13 Bulgarian Telecommunication C

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
23216 37 2 19 RAMtelecom Telecomunicaciones
27696 20 1 6 Multidata S.A.
5639 14 1 3 Telecommunications Services o
27947 14 1 12 Telconet S.A
12127 13 2 10 Telefonica Moviles El Salvado
8151 11 7 11 UniNet S.A. de C.V.
14754 11 7 9 Telgua S. A.
21599 10 1 6 NETDIRECT S.A.
10318 9 16 1 CABLEVISION S.A.
18678 8 3 8 Interconexion Electrica 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 757 48 3 Sudanese Mobile Telephone (ZA
24863 601 125 19 LINKdotNET AS number
6713 386 152 4 Itissalat Al-MAGHRIB
8452 242 392 3 TEDATA
24835 197 44 5 RAYA Telecom - Egypt
29571 162 12 5 Ci Telecom Autonomous system
15706 136 8 2 Sudatel Internet Exchange Aut
29975 117 442 14 Vodacom
36992 113 95 14 Etisalat MISR
37127 100 7 7 Visafone Communications Limit

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 2385 2944 18 BellSouth.net Inc.
18566 1898 366 142 MegaPath Corporation
22773 1625 2377 46 Cox Communications, Inc.
20115 1601 1616 535 Charter Communications
8402 1366 378 9 OJSC "Vimpelcom"
11492 1030 144 407 Cable One
1785 1027 353 35 PaeTec Communications, Inc.
7545 1016 154 12 TPG Internet Pty Ltd
20940 938 396 673 Akamai Technologies European
13977 845 62 135 FAIRPOINT COMMUNICATIONS, INC

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

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

ASN No of nets Net Savings Description
18566 1898 1756 MegaPath Corporation
22773 1625 1579 Cox Communications, Inc.
8402 1366 1357 OJSC "Vimpelcom"
20115 1601 1066 Charter Communications
7545 1016 1004 TPG Internet Pty Ltd
1785 1027 992 PaeTec Communications, Inc.
36998 757 754 Sudanese Mobile Telephone (ZA
13977 845 710 FAIRPOINT COMMUNICATIONS, INC
62823 638 628 Puerto Rico Cable Acquisition
11492 1030 623 Cable One

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 4323 Time Warner Telecom
62850 UNALLOCATED 8.25.147.0/24 46887 Lightower Fiber Netw
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
62861 UNALLOCATED 12.37.197.0/24 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 Communications

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

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

Network Origin AS Description
23.90.128.0/18 27418 OUTOFWALL INC.
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.
23.91.120.0/21 36351 SoftLayer Technologies 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 /8:14 /9:10 /10:14 /11:55 /12:134
/13:241 /14:368 /15:740 /16:3172 /17:2788 /18:4394
/19:8101 /20:13611 /21:14208 /22:17941 /23:16326 /24:82527
/25:141 /26:152 /27:71 /28:7 /29:7 /30:1
/31:0 /32:1

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

ASN No of nets Total ann. Description
18566 1866 1898 MegaPath Corporation
6389 1431 2385 BellSouth.net Inc.
8402 1341 1366 OJSC "Vimpelcom"
22773 1099 1625 Cox Communications, Inc.
11492 1014 1030 Cable One
1785 888 1027 PaeTec Communications, Inc.
13977 833 845 FAIRPOINT COMMUNICATIONS, INC
6983 747 781 ITC^Deltacom
36998 744 757 Sudanese Mobile Telephone (ZA
7011 693 775 Citizens Utilities

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

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

1:924 2:838 3:3 4:16 5:831 6:21
8:618 12:1882 13:3 14:899 15:9 16:3
17:20 18:19 20:34 23:617 24:1752 27:1703
31:1517 32:46 33:2 34:5 36:105 37:1956
38:918 39:3 40:182 41:3219 42:238 44:14
46:2104 47:10 49:703 50:859 52:12 54:44
55:5 56:4 57:26 58:1144 59:588 60:370
61:1496 62:1229 63:1979 64:4389 65:2331 66:4133
67:2111 68:1087 69:3295 70:909 71:511 72:2024
74:2587 75:323 76:301 77:1215 78:1030 79:677
80:1285 81:1084 82:644 83:756 84:629 85:1270
86:404 87:1014 88:519 89:1568 90:150 91:5742
92:618 93:1616 94:2103 95:1501 96:519 97:351
98:1083 99:41 100:32 101:693 103:3012

End of report
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