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, September 27, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 28 Sep, 2012

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

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

BGP routing table entries examined: 426730
Prefixes after maximum aggregation: 178682
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 209249
Total ASes present in the Internet Routing Table: 42212
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33684
Origin ASes announcing only one prefix: 15756
Transit ASes present in the Internet Routing Table: 5601
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 48687) 24
Prefixes from unregistered ASNs in the Routing Table: 763
Unregistered ASNs in the Routing Table: 277
Number of 32-bit ASNs allocated by the RIRs: 3331
Number of 32-bit ASNs visible in the Routing Table: 2927
Prefixes from 32-bit ASNs in the Routing Table: 7880
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 161
Number of addresses announced to Internet: 2602000492
Equivalent to 155 /8s, 23 /16s and 96 /24s
Percentage of available address space announced: 70.3
Percentage of allocated address space announced: 70.3
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.7
Total number of prefixes smaller than registry allocations: 149691

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

Prefixes being announced by APNIC Region ASes: 102844
Total APNIC prefixes after maximum aggregation: 32554
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103510
Unique aggregates announced from the APNIC address blocks: 42779
APNIC Region origin ASes present in the Internet Routing Table: 4762
APNIC Prefixes per ASN: 21.74
APNIC Region origin ASes announcing only one prefix: 1236
APNIC Region transit ASes present in the Internet Routing Table: 771
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 315
Number of APNIC addresses announced to Internet: 708736416
Equivalent to 42 /8s, 62 /16s and 117 /24s
Percentage of available APNIC address space announced: 82.8

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: 154378
Total ARIN prefixes after maximum aggregation: 78183
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 155253
Unique aggregates announced from the ARIN address blocks: 69104
ARIN Region origin ASes present in the Internet Routing Table: 15248
ARIN Prefixes per ASN: 10.18
ARIN Region origin ASes announcing only one prefix: 5760
ARIN Region transit ASes present in the Internet Routing Table: 1586
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1086920064
Equivalent to 64 /8s, 201 /16s and 21 /24s
Percentage of available ARIN address space announced: 57.5

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, 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: 108238
Total RIPE prefixes after maximum aggregation: 57188
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 110808
Unique aggregates announced from the RIPE address blocks: 71374
RIPE Region origin ASes present in the Internet Routing Table: 16880
RIPE Prefixes per ASN: 6.56
RIPE Region origin ASes announcing only one prefix: 8141
RIPE Region transit ASes present in the Internet Routing Table: 2709
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1902
Number of RIPE addresses announced to Internet: 647337508
Equivalent to 38 /8s, 149 /16s and 150 /24s
Percentage of available RIPE address space announced: 94.1

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: 43507
Total LACNIC prefixes after maximum aggregation: 8473
LACNIC Deaggregation factor: 5.13
Prefixes being announced from the LACNIC address blocks: 46769
Unique aggregates announced from the LACNIC address blocks: 22331
LACNIC Region origin ASes present in the Internet Routing Table: 1657
LACNIC Prefixes per ASN: 28.23
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 320
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 687
Number of LACNIC addresses announced to Internet: 116844840
Equivalent to 6 /8s, 246 /16s and 233 /24s
Percentage of available LACNIC address space announced: 69.6

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 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: 9759
Total AfriNIC prefixes after maximum aggregation: 2227
AfriNIC Deaggregation factor: 4.38
Prefixes being announced from the AfriNIC address blocks: 10229
Unique aggregates announced from the AfriNIC address blocks: 3529
AfriNIC Region origin ASes present in the Internet Routing Table: 565
AfriNIC Prefixes per ASN: 18.10
AfriNIC Region origin ASes announcing only one prefix: 176
AfriNIC Region transit ASes present in the Internet Routing Table: 129
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 41876736
Equivalent to 2 /8s, 126 /16s and 253 /24s
Percentage of available AfriNIC address space announced: 41.6

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 2979 11429 902 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1762 301 87 TPG Internet Pty Ltd
4755 1622 387 162 TATA Communications formerly
9829 1336 1106 41 BSNL National Internet Backbo
9583 1190 88 516 Sify Limited
4808 1116 2044 316 CNCGROUP IP network: China169
7552 1113 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
18101 1016 135 169 Reliance Infocom Ltd Internet

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 3298 3731 180 bellsouth.net, inc.
7029 3165 990 161 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1918 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
20115 1656 1581 617 Charter Communications
4323 1577 1153 387 Time Warner Telecom
30036 1388 275 731 Mediacom Communications Corp
7018 1256 10320 837 AT&T WorldNet Services
7011 1205 329 699 Citizens Utilities

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 1744 544 16 Corbina telecom
2118 1399 97 14 EUnet/RELCOM Autonomous Syste
12479 846 775 74 Uni2 Autonomous System
34984 782 206 181 BILISIM TELEKOM
6830 724 2313 448 UPC Distribution Services
31148 710 37 9 FreeNet ISP
13188 694 92 153 Educational Network
20940 693 219 538 Akamai Technologies European
58113 631 70 366 LIR DATACENTER TELECOM SRL
8551 573 364 61 Bezeq International

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
10620 2187 376 220 TVCABLE BOGOTA
28573 2130 1250 66 NET Servicos de Comunicao S.A
8151 1588 3045 346 UniNet S.A. de C.V.
7303 1561 1034 199 Telecom Argentina Stet-France
6503 1190 435 68 AVANTEL, S.A.
27947 724 74 91 Telconet S.A
3816 643 309 53 Empresa Nacional de Telecomun
6458 621 81 15 GUATEL
11172 591 85 69 Servicios Alestra S.A de C.V
14420 588 87 102 CORPORACION NACIONAL DE TELEC

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
24863 890 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 729 958 13 TEDATA
6713 517 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 264 904 224 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 192 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
33776 189 12 13 Starcomms Nigeria Limited

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 3298 3731 180 bellsouth.net, inc.
7029 3165 990 161 Windstream Communications Inc
4766 2979 11429 902 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2187 376 220 TVCABLE BOGOTA
28573 2130 1250 66 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1918 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
7545 1762 301 87 TPG Internet Pty Ltd

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

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

ASN No of nets Net Savings Description
7029 3165 3004 Windstream Communications Inc
17974 2355 2301 PT TELEKOMUNIKASI INDONESIA
4766 2979 2077 Korea Telecom (KIX)
28573 2130 2064 NET Servicos de Comunicao S.A
10620 2187 1967 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1918 1790 PaeTec Communications, Inc.
22773 1887 1759 Cox Communications, Inc.
8402 1744 1728 Corbina telecom
7545 1762 1675 TPG Internet Pty Ltd

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

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

Bad AS Designation Network Transit AS Description
59505 UNALLOCATED 5.2.65.0/24 50673 Serverius AS
59505 UNALLOCATED 5.2.66.0/24 50673 Serverius AS
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 12658 Dexterity Networks L
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59521 UNALLOCATED 5.134.192.0/21 29518 Labs2
59441 UNALLOCATED 5.144.128.0/21 50810 Mobin Net Communicat
59581 UNALLOCATED 5.149.8.0/21 25577 C4L main AS
59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o.

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

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

Prefix Origin AS Description
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.80.0/20 52041 Timer LTD
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/21 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition
128.0.168.0/21 15772 W-NET Kiev
128.0.176.0/20 30764 PODA s.r.o.
128.0.192.0/21 51483 SaSG GmbH & Co. KG

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

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

Network Origin AS Description
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg
14.192.24.0/22 45464 Room 201, TGU Bldg
14.192.28.0/22 45464 Room 201, TGU Bldg
27.112.114.0/24 23884 Proimage Engineering and Comm
41.220.80.0/24 38925 DAC AS Germany

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 /8:18 /9:14 /10:29 /11:87 /12:240
/13:477 /14:847 /15:1549 /16:12411 /17:6477 /18:10865
/19:21111 /20:30281 /21:32284 /22:42652 /23:40021 /24:223194
/25:1348 /26:1623 /27:915 /28:179 /29:66 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2648 3165 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1839 3298 bellsouth.net, inc.
8402 1456 1744 Corbina telecom
30036 1322 1388 Mediacom Communications Corp
22773 1229 1887 Cox Communications, Inc.
11492 1164 1201 Cable One
1785 1016 1918 PaeTec Communications, Inc.
7011 944 1205 Citizens Utilities
6983 884 984 ITC^Deltacom

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

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

1:622 2:677 3:1 4:13 5:540 6:3
8:465 12:1987 13:1 14:666 15:11 16:3
17:6 20:27 23:202 24:1786 27:1345 31:1009
32:54 33:2 34:2 36:7 37:820 38:829
39:2 40:133 41:3018 42:158 44:3 46:1599
47:2 49:469 50:599 52:13 54:21 55:8
56:1 57:27 58:991 59:542 60:238 61:1291
62:937 63:1984 64:4266 65:2234 66:4511 67:2055
68:1167 69:3229 70:987 71:509 72:1872 74:2598
75:485 76:315 77:968 78:960 79:493 80:1244
81:968 82:634 83:529 84:516 85:1157 86:491
87:926 88:364 89:1830 90:303 91:5232 92:598
93:1422 94:1632 95:1231 96:417 97:322 98:978
99:39 100:23 101:263 103:1564 105:512 106:118
107:198 108:463 109:1527 110:805 111:970 112:446
113:712 114:626 115:887 116:892 117:734 118:931
119:1216 120:310 121:691 122:1633 123:1165 124:1329
125:1276 128:562 129:190 130:282 131:635 132:310
133:22 134:251 135:61 136:219 137:239 138:337
139:171 140:498 141:280 142:485 143:387 144:492
145:81 146:519 147:262 148:739 149:325 150:154
151:192 152:451 153:178 154:20 155:420 156:224
157:373 158:258 159:658 160:344 161:411 162:363
163:189 164:694 165:417 166:528 167:553 168:966
169:126 170:908 171:165 172:6 173:1686 174:611
175:443 176:790 177:1244 178:1611 180:1349 181:136
182:1054 183:296 184:606 185:6 186:2195 187:1184
188:1697 189:1357 190:6069 192:6030 193:5725 194:4563
195:3480 196:1218 197:225 198:3818 199:5022 200:5970
201:1976 202:8715 203:8734 204:4424 205:2535 206:2760
207:2853 208:4061 209:3654 210:2854 211:1533 212:1988
213:1818 214:889 215:87 216:5122 217:1556 218:570
219:315 220:1250 221:535 222:337 223:411

End of report
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