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.

Wednesday, October 2, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 03 Oct, 2013

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

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

BGP routing table entries examined: 468466
Prefixes after maximum aggregation: 188972
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 232341
Total ASes present in the Internet Routing Table: 45073
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35210
Origin ASes announcing only one prefix: 16248
Transit ASes present in the Internet Routing Table: 5898
Transit-only ASes present in the Internet Routing Table: 165
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 39
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 298
Unregistered ASNs in the Routing Table: 166
Number of 32-bit ASNs allocated by the RIRs: 5129
Number of 32-bit ASNs visible in the Routing Table: 3965
Prefixes from 32-bit ASNs in the Routing Table: 12121
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 647
Number of addresses announced to Internet: 2647723284
Equivalent to 157 /8s, 209 /16s and 13 /24s
Percentage of available address space announced: 71.5
Percentage of allocated address space announced: 71.5
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.0
Total number of prefixes smaller than registry allocations: 163955

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

Prefixes being announced by APNIC Region ASes: 111146
Total APNIC prefixes after maximum aggregation: 33743
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 113180
Unique aggregates announced from the APNIC address blocks: 46752
APNIC Region origin ASes present in the Internet Routing Table: 4868
APNIC Prefixes per ASN: 23.25
APNIC Region origin ASes announcing only one prefix: 1218
APNIC Region transit ASes present in the Internet Routing Table: 825
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 21
Number of APNIC region 32-bit ASNs visible in the Routing Table: 693
Number of APNIC addresses announced to Internet: 728530432
Equivalent to 43 /8s, 108 /16s and 126 /24s
Percentage of available APNIC address space announced: 85.1

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: 162774
Total ARIN prefixes after maximum aggregation: 81538
ARIN Deaggregation factor: 2.00
Prefixes being announced from the ARIN address blocks: 163280
Unique aggregates announced from the ARIN address blocks: 75861
ARIN Region origin ASes present in the Internet Routing Table: 15890
ARIN Prefixes per ASN: 10.28
ARIN Region origin ASes announcing only one prefix: 6015
ARIN Region transit ASes present in the Internet Routing Table: 1652
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 39
Number of ARIN region 32-bit ASNs visible in the Routing Table: 22
Number of ARIN addresses announced to Internet: 1073040128
Equivalent to 63 /8s, 245 /16s and 75 /24s
Percentage of available ARIN address space announced: 56.8

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: 118840
Total RIPE prefixes after maximum aggregation: 61210
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 122418
Unique aggregates announced from the RIPE address blocks: 78901
RIPE Region origin ASes present in the Internet Routing Table: 17445
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8259
RIPE Region transit ASes present in the Internet Routing Table: 2807
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2404
Number of RIPE addresses announced to Internet: 656682980
Equivalent to 39 /8s, 36 /16s and 47 /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, 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: 51859
Total LACNIC prefixes after maximum aggregation: 9850
LACNIC Deaggregation factor: 5.26
Prefixes being announced from the LACNIC address blocks: 56741
Unique aggregates announced from the LACNIC address blocks: 26257
LACNIC Region origin ASes present in the Internet Routing Table: 2024
LACNIC Prefixes per ASN: 28.03
LACNIC Region origin ASes announcing only one prefix: 565
LACNIC Region transit ASes present in the Internet Routing Table: 383
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 28
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 840
Number of LACNIC addresses announced to Internet: 139949616
Equivalent to 8 /8s, 87 /16s and 118 /24s
Percentage of available LACNIC address space announced: 83.4

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: 11580
Total AfriNIC prefixes after maximum aggregation: 2546
AfriNIC Deaggregation factor: 4.55
Prefixes being announced from the AfriNIC address blocks: 12200
Unique aggregates announced from the AfriNIC address blocks: 4010
AfriNIC Region origin ASes present in the Internet Routing Table: 655
AfriNIC Prefixes per ASN: 18.63
AfriNIC Region origin ASes announcing only one prefix: 191
AfriNIC Region transit ASes present in the Internet Routing Table: 138
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: 47718656
Equivalent to 2 /8s, 216 /16s and 33 /24s
Percentage of available AfriNIC address space announced: 47.4

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 2947 11563 946 Korea Telecom (KIX)
17974 2698 903 90 PT TELEKOMUNIKASI INDONESIA
7545 2083 321 112 TPG Internet Pty Ltd
4755 1760 391 187 TATA Communications formerly
9829 1548 1236 41 BSNL National Internet Backbo
9583 1237 93 507 Sify Limited
9498 1196 309 72 BHARTI Airtel Ltd.
4808 1191 2131 347 CNCGROUP IP network: China169
7552 1163 1080 13 Vietel Corporation
24560 1090 380 164 Bharti Airtel Ltd., Telemedia

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 3061 3689 59 BellSouth.net Inc.
18566 2066 382 184 Covad Communications
22773 2055 2943 140 Cox Communications, Inc.
1785 2019 679 125 PaeTec Communications, Inc.
20115 1684 1651 629 Charter Communications
4323 1618 1103 418 Time Warner Telecom
701 1521 11149 793 UUNET Technologies, Inc.
7018 1342 17499 852 AT&T WorldNet Services
30036 1330 299 642 Mediacom Communications Corp
6983 1294 772 579 ITC^Deltacom

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 1848 544 17 OJSC "Vimpelcom"
34984 1364 244 221 TELLCOM ILETISIM HIZMETLERI A
20940 1037 382 801 Akamai Technologies European
31148 990 43 19 FreeNet ISP
6830 891 2365 425 UPC Distribution Services
13188 849 99 67 TOV "Bank-Inform"
8551 751 370 41 Bezeq International
12479 676 799 49 Uni2 Autonomous System
35228 528 246 16 Avatar Broadband Limited
3320 510 8416 405 Deutsche Telekom AG

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 3345 1733 92 NET Servicos de Comunicao S.A
10620 2583 421 245 TVCABLE BOGOTA
7303 1722 1134 232 Telecom Argentina Stet-France
18881 1439 844 20 Global Village Telecom
8151 1340 2803 413 UniNet S.A. de C.V.
11830 865 364 15 Instituto Costarricense de El
6503 849 434 63 AVANTEL, S.A.
27947 837 93 91 Telconet S.A
6147 799 373 27 Telefonica Del Peru
7738 780 1498 36 Telecomunicacoes da Bahia 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 1864 112 5 Sudanese Mobile Telephone (ZA
24863 883 306 30 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 417 956 9 TEDATA
24835 292 80 8 RAYA Telecom - Egypt
3741 258 921 216 The Internet Solution
29571 223 17 12 Ci Telecom Autonomous system
36992 222 501 28 Etisalat MISR
15706 221 32 6 Sudatel Internet Exchange Aut
29975 192 668 21 Vodacom

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 3345 1733 92 NET Servicos de Comunicao S.A
6389 3061 3689 59 BellSouth.net Inc.
4766 2947 11563 946 Korea Telecom (KIX)
17974 2698 903 90 PT TELEKOMUNIKASI INDONESIA
10620 2583 421 245 TVCABLE BOGOTA
7545 2083 321 112 TPG Internet Pty Ltd
18566 2066 382 184 Covad Communications
22773 2055 2943 140 Cox Communications, Inc.
1785 2019 679 125 PaeTec Communications, Inc.
36998 1864 112 5 Sudanese Mobile Telephone (ZA

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 3061 3002 BellSouth.net Inc.
17974 2698 2608 PT TELEKOMUNIKASI INDONESIA
10620 2583 2338 TVCABLE BOGOTA
4766 2947 2001 Korea Telecom (KIX)
7545 2083 1971 TPG Internet Pty Ltd
22773 2055 1915 Cox Communications, Inc.
1785 2019 1894 PaeTec Communications, Inc.
18566 2066 1882 Covad Communications
36998 1864 1859 Sudanese Mobile Telephone (ZA
8402 1848 1831 OJSC "Vimpelcom"

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
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
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

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 36086 Broad Communications Technolo
23.91.0.0/19 40676 Psychz Networks
23.91.32.0/19 36315 Servpac Inc.
23.91.96.0/20 40676 Psychz Networks
23.91.112.0/21 32475 MidPhase Inc.
23.91.160.0/22 36493 3757277 Canada Inc. (oa 295.c
23.91.160.0/19 36493 3757277 Canada Inc. (oa 295.c
23.91.164.0/22 36493 3757277 Canada Inc. (oa 295.c
23.91.168.0/22 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 /8:16 /9:11 /10:31 /11:92 /12:251
/13:480 /14:913 /15:1627 /16:12823 /17:6691 /18:11205
/19:22938 /20:32563 /21:35225 /22:49691 /23:43066 /24:248324
/25:889 /26:994 /27:475 /28:49 /29:78 /30:20
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2017 2066 Covad Communications
36998 1829 1864 Sudanese Mobile Telephone (ZA
6389 1710 3061 BellSouth.net Inc.
8402 1568 1848 OJSC "Vimpelcom"
22773 1327 2055 Cox Communications, Inc.
11492 1193 1234 Cable One
30036 1188 1330 Mediacom Communications Corp
1785 1085 2019 PaeTec Communications, Inc.
6983 1034 1294 ITC^Deltacom
22561 962 1237 Digital Teleport, Inc

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

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

1:844 2:859 3:3 4:17 5:989 6:19
8:614 12:1895 13:3 14:872 15:11 16:3
17:13 18:19 20:21 23:447 24:1708 27:1594
31:1480 32:45 33:2 34:5 36:81 37:1820
38:903 39:3 40:179 41:3246 42:249 44:12
46:2030 47:5 49:678 50:838 52:12 54:39
55:3 57:26 58:1166 59:611 60:351 61:1426
62:1182 63:1992 64:4546 65:2352 66:4187 67:2078
68:1089 69:3328 70:858 71:494 72:1984 74:2557
75:329 76:304 77:1165 78:1059 79:649 80:1342
81:1033 82:625 83:585 84:593 85:1280 86:454
87:1011 88:553 89:1724 90:155 91:5635 92:612
93:1623 94:1978 95:1638 96:516 97:342 98:1042
99:43 100:31 101:611 103:3350 105:520 106:143
107:210 108:509 109:1884 110:970 111:1126 112:581
113:804 114:716 115:1013 116:988 117:828 118:1164
119:1284 120:370 121:734 122:1884 123:1250 124:1385
125:1424 128:620 129:321 130:322 131:649 132:349
133:162 134:547 135:67 136:276 137:262 138:350
139:181 140:182 141:325 142:548 143:422 144:503
145:102 146:514 147:404 148:702 149:352 150:158
151:601 152:412 153:199 154:47 155:488 156:281
157:421 158:285 159:768 160:348 161:446 162:728
163:227 164:633 165:573 166:258 167:622 168:1048
169:128 170:1080 171:200 172:25 173:1609 174:664
175:502 176:1236 177:2293 178:1900 179:141 180:1559
181:743 182:1329 183:477 184:657 185:905 186:2562
187:1476 188:1889 189:1336 190:7130 192:6976 193:5622
194:4074 195:3326 196:1318 197:990 198:4677 199:5474
200:6062 201:2553 202:8962 203:8910 204:4506 205:2620
206:2853 207:2903 208:4005 209:3618 210:2946 211:1575
212:2261 213:2019 214:907 215:98 216:5378 217:1670
218:623 219:323 220:1279 221:566 222:326 223:503


End of report
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