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, October 3, 2013

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 468338
Prefixes after maximum aggregation: 188996
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 232372
Total ASes present in the Internet Routing Table: 45106
Prefixes per ASN: 10.38
Origin-only ASes present in the Internet Routing Table: 35234
Origin ASes announcing only one prefix: 16253
Transit ASes present in the Internet Routing Table: 5897
Transit-only ASes present in the Internet Routing Table: 166
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: 294
Unregistered ASNs in the Routing Table: 168
Number of 32-bit ASNs allocated by the RIRs: 5139
Number of 32-bit ASNs visible in the Routing Table: 3975
Prefixes from 32-bit ASNs in the Routing Table: 12253
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 649
Number of addresses announced to Internet: 2647567364
Equivalent to 157 /8s, 206 /16s and 172 /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: 163879

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

Prefixes being announced by APNIC Region ASes: 111047
Total APNIC prefixes after maximum aggregation: 33793
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 113075
Unique aggregates announced from the APNIC address blocks: 46787
APNIC Region origin ASes present in the Internet Routing Table: 4877
APNIC Prefixes per ASN: 23.19
APNIC Region origin ASes announcing only one prefix: 1223
APNIC Region transit ASes present in the Internet Routing Table: 823
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: 695
Number of APNIC addresses announced to Internet: 728285696
Equivalent to 43 /8s, 104 /16s and 194 /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: 162699
Total ARIN prefixes after maximum aggregation: 81580
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 163293
Unique aggregates announced from the ARIN address blocks: 75828
ARIN Region origin ASes present in the Internet Routing Table: 15898
ARIN Prefixes per ASN: 10.27
ARIN Region origin ASes announcing only one prefix: 6021
ARIN Region transit ASes present in the Internet Routing Table: 1658
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: 1073096960
Equivalent to 63 /8s, 246 /16s and 41 /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: 118851
Total RIPE prefixes after maximum aggregation: 61233
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 122421
Unique aggregates announced from the RIPE address blocks: 78869
RIPE Region origin ASes present in the Internet Routing Table: 17447
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8256
RIPE Region transit ASes present in the Internet Routing Table: 2805
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: 2405
Number of RIPE addresses announced to Internet: 656688100
Equivalent to 39 /8s, 36 /16s and 67 /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: 51760
Total LACNIC prefixes after maximum aggregation: 9759
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 56690
Unique aggregates announced from the LACNIC address blocks: 26326
LACNIC Region origin ASes present in the Internet Routing Table: 2026
LACNIC Prefixes per ASN: 27.98
LACNIC Region origin ASes announcing only one prefix: 563
LACNIC Region transit ASes present in the Internet Routing Table: 385
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 847
Number of LACNIC addresses announced to Internet: 139940128
Equivalent to 8 /8s, 87 /16s and 81 /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: 11579
Total AfriNIC prefixes after maximum aggregation: 2544
AfriNIC Deaggregation factor: 4.55
Prefixes being announced from the AfriNIC address blocks: 12210
Unique aggregates announced from the AfriNIC address blocks: 4002
AfriNIC Region origin ASes present in the Internet Routing Table: 654
AfriNIC Prefixes per ASN: 18.67
AfriNIC Region origin ASes announcing only one prefix: 190
AfriNIC Region transit ASes present in the Internet Routing Table: 137
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: 47751424
Equivalent to 2 /8s, 216 /16s and 161 /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 2084 321 112 TPG Internet Pty Ltd
4755 1768 391 186 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 1164 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 1682 1651 619 Charter Communications
4323 1616 1103 418 Time Warner Telecom
701 1521 11149 793 UUNET Technologies, Inc.
30036 1334 301 643 Mediacom Communications Corp
7018 1331 17499 857 AT&T WorldNet Services
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 1872 544 17 OJSC "Vimpelcom"
34984 1364 244 221 TELLCOM ILETISIM HIZMETLERI A
20940 1040 383 801 Akamai Technologies European
31148 990 43 19 FreeNet ISP
6830 891 2365 425 UPC Distribution Services
13188 849 99 67 TOV "Bank-Inform"
8551 750 370 41 Bezeq International
12479 680 799 49 Uni2 Autonomous System
35228 528 246 16 Avatar Broadband Limited
3320 514 8418 406 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 3362 1734 88 NET Servicos de Comunicao S.A
10620 2599 423 245 TVCABLE BOGOTA
7303 1724 1135 233 Telecom Argentina Stet-France
18881 1462 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 816 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 882 306 30 LINKdotNET AS number
6713 554 633 26 Itissalat Al-MAGHRIB
8452 421 956 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 3362 1734 88 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 2599 423 245 TVCABLE BOGOTA
7545 2084 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.
8402 1872 544 17 OJSC "Vimpelcom"

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 2599 2354 TVCABLE BOGOTA
4766 2947 2001 Korea Telecom (KIX)
7545 2084 1972 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 1872 1855 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
/13:481 /14:912 /15:1626 /16:12818 /17:6694 /18:11192
/19:22965 /20:32563 /21:35235 /22:49736 /23:42979 /24:248335
/25:892 /26:992 /27:478 /28:13 /29:12 /30:5
/31:0 /32:9

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 1594 1872 OJSC "Vimpelcom"
22773 1327 2055 Cox Communications, Inc.
11492 1193 1234 Cable One
30036 1191 1334 Mediacom Communications Corp
1785 1085 2019 PaeTec Communications, Inc.
6983 1034 1294 ITC^Deltacom
22561 961 1236 Digital Teleport, Inc

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

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

1:846 2:861 3:3 4:17 5:992 6:19
8:615 12:1895 13:3 14:872 15:11 16:3
17:14 18:19 20:21 23:451 24:1718 27:1597
31:1479 32:45 33:2 34:5 36:81 37:1821
38:906 39:3 40:179 41:3251 42:249 44:13
46:2019 47:5 49:678 50:839 52:12 54:39
55:3 57:26 58:1167 59:612 60:352 61:1425
62:1182 63:1976 64:4529 65:2348 66:4180 67:2077
68:1089 69:3328 70:858 71:497 72:1987 74:2558
75:326 76:306 77:1166 78:1055 79:649 80:1340
81:1021 82:625 83:587 84:594 85:1261 86:456
87:1011 88:555 89:1726 90:157 91:5634 92:614
93:1623 94:1978 95:1660 96:513 97:342 98:1035
99:43 100:31 101:611 103:3357 105:520 106:143
107:212 108:507 109:1879 110:955 111:1127 112:581
113:804 114:718 115:1013 116:978 117:829 118:1164
119:1291 120:370 121:733 122:1884 123:1249 124:1339
125:1424 128:619 129:325 130:322 131:649 132:349
133:162 134:548 135:67 136:275 137:266 138:350
139:181 140:181 141:324 142:548 143:417 144:499
145:103 146:517 147:406 148:702 149:351 150:156
151:601 152:412 153:199 154:47 155:489 156:282
157:422 158:285 159:762 160:348 161:452 162:729
163:227 164:633 165:570 166:258 167:623 168:1049
169:128 170:1082 171:200 172:25 173:1606 174:664
175:502 176:1238 177:2342 178:1902 179:155 180:1557
181:739 182:1331 183:476 184:657 185:905 186:2616
187:1470 188:1878 189:1344 190:7114 192:6995 193:5620
194:4067 195:3331 196:1322 197:988 198:4676 199:5477
200:6052 201:2534 202:8979 203:8913 204:4507 205:2618
206:2850 207:2893 208:4008 209:3618 210:2946 211:1575
212:2264 213:2011 214:909 215:99 216:5384 217:1670
218:622 219:323 220:1279 221:566 222:326 223:504


End of report
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