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IPv4 root -> 66/8 -> 66.0.0.0/8

Summary for subnet 66.0.0.0/8

IP-range/subnet66.0.0.0-66.255.255.255
LocationUnited States (US) us flag
Registryarin
Number of domains hosted2,987,476
Number of nameservers hosted46,746
Number of mailservers hosted2,248,494
Number of SPAM hosts hosted423
Number of IDN domains hosted462
Number of domains in Alexa top million8,603
Number of IP routes7,763

Subnets based on RIR allocations

SubnetDescriptionRIRCountry#routes#domains#spamhosts
66.0.0.0/16Windstream Communications LLCarinUS232220
66.1.0.0/16Sprint Communications, Inc.arinUS2480
66.2.0.0/15MCI Communications Services, Inc. d/b/a arinUS51060
66.4.0.0/15State of Tennessee Department of EducatiarinUS6181
66.6.0.0/20INTERSTATE TELECOMMUNICATIONS COOPERATIVarinUS3170
66.6.16.0/20Sobonito Investments ltd.arinUS48990
66.6.32.0/20TUMBLR, INC.arinUS3131,4350
66.6.48.0/20MOMENTOUS.CA CorporationarinCA01180
66.6.64.0/20Windstream Communications LLCarinUS150
66.6.80.0/20Shell Information Technology InternationarinUS040
66.6.96.0/19LightEdge SolutionsarinUS54020
66.6.128.0/20SKYWEB, INC.arinUS10510
66.6.144.0/20Cox Enterprises IncarinUS53640
66.6.160.0/20Fidelity Access Networks, LLCarinUS4800
66.6.176.0/20ResMed Corp.arinUS230
66.6.192.0/20Waymark Internet Services, Inc.arinUS1140
66.6.208.0/20TierzeroarinUS150
66.6.224.0/19NBA Properties, Inc.arinUS430
66.7.0.0/18Broadview Networks, Inc.arinUS2300
66.7.64.0/19Fastel Media IncarinCA130
66.7.96.0/20TSS CommunicationsarinUS2600
66.7.112.0/20Off Campus TelecommunicationsarinUS11210
66.7.128.0/18GTTarinUS182,2930
66.7.192.0/19HostDime.com, Inc.arinUS133,3533
66.7.224.0/19TPx CommunicationsarinUS2750
66.8.0.0/17MTN SAafrinicZA13180
66.8.128.0/17Time Warner Cable Internet LLCarinUS1290
66.9.0.0/16M2ngage Telecommunications II Corp.arinUS121880
66.10.0.0/16AT&T Corp.arinUS3120
66.11.0.0/19CONTINENTAL BROADBAND PENNSYLVANIA, INC.arinUS28040
66.11.32.0/20COGECODATAarinCA13001
66.11.48.0/20PHOTOBUCKET.COM, INC.arinUS510
66.11.64.0/19TeraGo Networks Inc.arinCA221230
66.11.96.0/20NetNITCOarinUS190
66.11.112.0/20Garrison Network Solutions LLCarinUS167,4050
66.11.128.0/20Stafford Associates Computer SpecialistsarinUS124840
66.11.144.0/20Canada Web HostingarinCA11,0070
66.11.160.0/19DISTRIBUTEL COMMUNICATIONS LTD.arinCA1190
66.11.192.0/19ShoreTel, Inc.arinUS5150
66.11.240.0/20Bledsoe Telephone Cooperative CorporatioarinUS1520
66.12.0.0/14MCI Communications Services, Inc. d/b/a arinUS2891770
66.16.0.0/16Windstream Communications LLCarinUS1520
66.17.0.0/18Arrival Communication, IncarinUS1850
66.17.64.0/20MegaPath CorporationarinUS900
66.17.80.0/20Sparkplug Southwest, LLC.arinUS6130
66.17.96.0/19SWIFTEL COMMUNICATIONSarinUS2311
66.17.128.0/17GTTarinUS166920
66.18.0.0/20DataBank Holdings, Ltd.arinUS48190
66.18.16.0/20DCT Technologies, Inc.arinUS14120
66.18.32.0/19EPB Fiber OpticsarinUS25661
66.18.64.0/19Sentech Ltd - ISPafrinicZA190
66.18.96.0/19Peak 10, Inc.arinUS34681
66.18.128.0/19MPOWER COMMUNICATIONS CORP.arinUS17230
66.18.160.0/20TULARO-V4-66-18-160-0-20arinUS1580
66.18.176.0/20Adamswells InternetarinUS4170
66.18.192.0/18Nucleus Information Service, Inc.arinCA21,0350
66.19.0.0/16PaeTec Communications, Inc.arinUS1140
66.20.0.0/15AT&T Corp.arinUS46431
66.22.0.0/16Digicon CorporationarinUS5110
66.23.0.0/17Digicon CorporationarinUS32980
66.23.128.0/18Digicon CorporationarinUS31710
66.23.192.0/21ServerCratearinUS81,2191
66.23.200.0/21US DedicatedarinUS81,1260
66.23.208.0/22Invero S. de R.L. de C.V.arinUS410
66.23.212.0/22SINAP-TIX, LLCarinUS310
66.23.216.0/22Insurance Auto Auctions, IncarinUS200
66.23.220.0/22MAW COMMUNICATIONSarinUS200
66.23.224.0/20Interserver, IncarinUS32,6553
66.23.240.0/20SolidSpace LLCarinUS45860
66.24.0.0/16Time Warner Cable Internet LLCarinUS1512
66.25.0.0/16Time Warner Cable Internet LLCarinUS41512
66.26.0.0/16Time Warner Cable Internet LLCarinUS3332
66.27.0.0/16Time Warner Cable Internet LLCarinUS62201
66.28.0.0/16Cogent CommunicationsarinUS245280
66.29.0.0/17Net Access CorporationarinUS23540
66.29.128.0/19Advantagecom Networks, Inc.arinUS17570
66.29.160.0/19Utah Broadband LLCarinUS11104
66.29.192.0/19CBEYOND COMMUNICATIONS, LLCarinUS11,2130
66.29.224.0/19Windstream Communications LLCarinUS1130
66.30.0.0/15RW2-NORTHEAST-6arinUS12641
66.32.0.0/16Windstream Communications LLCarinUS26990
66.33.0.0/17Peer 1 Dedicated HostingarinCA11,1260
66.33.128.0/18N2P-1arinUS1010
66.33.192.0/19New Dream Network, LLCarinUS1180,8881
66.33.224.0/19Frontier Communications of America, Inc.arinUS140
66.34.0.0/16CoreSpace, Inc.arinUS114,6730
66.35.0.0/20Noel Communications, Inc.arinUS9340
66.35.16.0/20Fortinet Inc.arinUS010
66.35.32.0/19FORTRUSTarinUS61,0810
66.35.64.0/19Burges Property CompanyarinUS69830
66.35.96.0/19Northern Valley Communications LLCarinUS41,2170
66.35.128.0/18Windstream Communications LLCarinUS2590
66.35.192.0/18CenturyLink Communications, LLCarinUS23610
66.36.0.0/20PaeTec Communications, Inc.arinUS120
66.36.16.0/20TierPoint, LLCarinUS110
66.36.32.0/19PaeTec Communications, Inc.arinUS1100
66.36.64.0/19Nasdaq, Inc.arinUS200
66.36.96.0/20Peer 1 Dedicated HostingarinCA12,8490
66.36.112.0/20Colorado Central TelecomarinUS1460
66.36.128.0/19AEI Internet Inc.arinCA8100

Showing max 100 subnets. Premium members can view all subnets on this level. Summary of other available subnets:

66.36.160.0/19 66.36.192.0/19 66.36.224.0/19 66.37.0.0/19 66.37.32.0/20 66.37.48.0/20 66.37.64.0/19 66.37.96.0/20 66.37.112.0/20 66.37.128.0/19 66.37.160.0/19 66.37.192.0/19 66.37.224.0/19 66.38.0.0/17 66.38.128.0/17 66.39.0.0/17 66.39.128.0/19 66.39.160.0/19 66.39.192.0/19 66.39.224.0/19 66.40.0.0/16 66.41.0.0/16 66.42.0.0/19 66.42.32.0/19 66.42.64.0/18 66.42.128.0/17 66.43.0.0/20 66.43.16.0/20 66.43.32.0/20 66.43.48.0/20 66.43.64.0/20 66.43.80.0/21 66.43.88.0/22 66.43.92.0/24 66.43.93.0/24 66.43.94.0/24 66.43.95.0/24 66.43.96.0/23 66.43.98.0/24 66.43.99.0/24 66.43.100.0/24 66.43.101.0/24 66.43.102.0/23 66.43.104.0/24 66.43.105.0/24 66.43.106.0/24 66.43.107.0/24 66.43.108.0/24 66.43.109.0/24 66.43.110.0/24 66.43.111.0/24 66.43.112.0/21 66.43.120.0/21 66.43.128.0/18 66.43.192.0/18 66.44.0.0/17 66.44.128.0/18 66.44.192.0/19 66.44.224.0/20 66.44.240.0/20 66.45.0.0/17 66.45.128.0/19 66.45.160.0/19 66.45.192.0/19 66.45.224.0/19 66.46.0.0/16 66.47.0.0/16 66.48.0.0/16 66.49.0.0/17 66.49.128.0/18 66.49.192.0/20 66.49.208.0/20 66.49.224.0/20 66.49.240.0/21 66.49.248.0/22 66.49.252.0/23 66.49.254.0/24 66.49.255.0/24 66.50.0.0/16 66.51.0.0/19 66.51.32.0/20 66.51.48.0/20 66.51.64.0/19 66.51.96.0/19 66.51.128.0/20 66.51.144.0/20 66.51.160.0/20 66.51.176.0/20 66.51.192.0/19 66.51.224.0/20 66.51.240.0/20 66.52.0.0/15 66.54.0.0/18 66.54.64.0/19 66.54.96.0/20 66.54.112.0/20 66.54.128.0/17 66.55.0.0/18 66.55.64.0/20 66.55.80.0/20 66.55.96.0/20 66.55.112.0/20 66.55.128.0/19 66.55.160.0/19 66.55.192.0/19 66.55.224.0/19 66.56.0.0/18 66.56.64.0/19 66.56.96.0/19 66.56.128.0/17 66.57.0.0/16 66.58.0.0/17 66.58.128.0/17 66.59.0.0/19 66.59.32.0/20 66.59.48.0/20 66.59.64.0/19 66.59.96.0/19 66.59.128.0/18 66.59.224.0/19 66.60.0.0/18 66.60.64.0/19 66.60.96.0/19 66.60.128.0/18 66.60.192.0/19 66.60.224.0/23 66.60.226.0/24 66.60.227.0/24 66.60.228.0/22 66.60.232.0/23 66.60.234.0/24 66.60.235.0/24 66.60.236.0/22 66.60.240.0/24 66.60.241.0/24 66.60.242.0/23 66.60.244.0/24 66.60.245.0/24 66.60.246.0/23 66.60.248.0/21 66.61.0.0/16 66.62.0.0/16 66.63.0.0/18 66.63.64.0/18 66.63.128.0/19 66.63.160.0/19 66.63.192.0/19 66.63.224.0/19 66.64.0.0/18 66.64.64.0/19 66.64.96.0/19 66.64.128.0/17 66.65.0.0/16 66.66.0.0/15 66.68.0.0/15 66.70.0.0/17 66.70.128.0/17 66.71.0.0/17 66.71.128.0/18 66.71.192.0/19 66.71.224.0/20 66.71.240.0/20 66.72.0.0/15 66.74.0.0/15 66.76.0.0/16 66.77.0.0/16 66.78.0.0/18 66.78.64.0/19 66.78.96.0/19 66.78.128.0/18 66.78.192.0/18 66.79.0.0/18 66.79.64.0/19 66.79.96.0/19 66.79.128.0/19 66.79.160.0/19 66.79.192.0/19 66.79.224.0/19 66.80.0.0/16 66.81.0.0/23 66.81.2.0/23 66.81.4.0/23 66.81.6.0/24 66.81.7.0/24 66.81.8.0/24 66.81.9.0/24 66.81.10.0/23 66.81.12.0/23 66.81.14.0/24 66.81.15.0/24 66.81.16.0/21 66.81.24.0/22 66.81.28.0/23 66.81.30.0/23 66.81.32.0/22 66.81.36.0/23 66.81.38.0/23 66.81.40.0/21 66.81.48.0/23 66.81.50.0/23 66.81.52.0/22 66.81.56.0/21 66.81.64.0/20 66.81.80.0/24 66.81.81.0/24 66.81.82.0/23 66.81.84.0/22 66.81.88.0/22 66.81.92.0/23 66.81.94.0/24 66.81.95.0/24 66.81.96.0/22 66.81.100.0/23 66.81.102.0/24 66.81.103.0/24 66.81.104.0/23 66.81.106.0/23 66.81.108.0/22 66.81.112.0/21 66.81.120.0/22 66.81.124.0/22 66.81.128.0/22 66.81.132.0/24 66.81.133.0/24 66.81.134.0/23 66.81.136.0/21 66.81.144.0/21 66.81.152.0/22 66.81.156.0/23 66.81.158.0/24 66.81.159.0/24 66.81.160.0/19 66.81.192.0/20 66.81.208.0/22 66.81.212.0/22 66.81.216.0/21 66.81.224.0/23 66.81.226.0/24 66.81.227.0/24 66.81.228.0/22 66.81.232.0/21 66.81.240.0/20 66.82.0.0/16 66.83.0.0/16 66.84.0.0/18 66.84.64.0/20 66.84.80.0/20 66.84.96.0/19 66.84.128.0/17 66.85.0.0/24 66.85.1.0/24 66.85.2.0/24 66.85.3.0/24 66.85.4.0/23 66.85.6.0/24 66.85.7.0/24 66.85.8.0/24 66.85.9.0/24 66.85.10.0/24 66.85.11.0/24 66.85.12.0/24 66.85.13.0/24 66.85.14.0/23 66.85.16.0/22 66.85.20.0/24 66.85.21.0/24 66.85.22.0/23 66.85.24.0/24 66.85.25.0/24 66.85.26.0/23 66.85.28.0/22 66.85.32.0/23 66.85.34.0/24 66.85.35.0/24 66.85.36.0/22 66.85.40.0/24 66.85.41.0/24 66.85.42.0/24 66.85.43.0/24 66.85.44.0/22 66.85.48.0/21 66.85.56.0/23 66.85.58.0/24 66.85.59.0/24 66.85.60.0/24 66.85.61.0/24 66.85.62.0/24 66.85.63.0/24 66.85.66.0/24 66.85.67.0/24 66.85.68.0/24 66.85.69.0/24 66.85.70.0/23 66.85.72.0/21 66.85.80.0/24 66.85.81.0/24 66.85.82.0/23 66.85.84.0/22 66.85.88.0/23 66.85.90.0/24 66.85.91.0/24 66.85.92.0/22 66.85.96.0/19 66.85.128.0/18 66.85.192.0/19 66.85.224.0/20 66.85.240.0/21 66.85.248.0/22 66.85.252.0/23 66.85.254.0/24 66.85.255.0/24 66.86.0.0/16 66.87.0.0/16 66.88.0.0/15 66.90.0.0/18 66.90.64.0/18 66.90.128.0/17 66.91.0.0/16 66.92.0.0/15 66.94.0.0/19 66.94.32.0/20 66.94.48.0/20 66.94.64.0/19 66.94.96.0/19 66.94.128.0/18 66.94.192.0/19 66.94.224.0/19 66.95.0.0/16 66.96.0.0/20 66.96.16.0/20 66.96.32.0/19 66.96.64.0/20 66.96.80.0/20 66.96.96.0/20 66.96.112.0/20 66.96.128.0/18 66.96.192.0/19 66.96.224.0/19 66.97.0.0/20 66.97.16.0/20 66.97.32.0/20 66.97.48.0/20 66.97.64.0/19 66.97.96.0/20 66.97.128.0/20 66.97.144.0/20 66.97.160.0/23 66.97.162.0/23 66.97.164.0/24 66.97.165.0/24 66.97.166.0/24 66.97.167.0/24 66.97.168.0/24 66.97.169.0/24 66.97.170.0/24 66.97.171.0/24 66.97.172.0/23 66.97.174.0/23 66.97.176.0/24 66.97.177.0/24 66.97.178.0/24 66.97.179.0/24 66.97.180.0/22 66.97.184.0/22 66.97.188.0/24 66.97.189.0/24 66.97.190.0/23 66.97.192.0/19 66.97.224.0/19 66.98.0.0/18 66.98.64.0/19 66.98.96.0/20 66.98.112.0/20 66.98.128.0/17 66.99.0.0/16 66.100.0.0/15 66.102.0.0/20 66.102.16.0/20 66.102.32.0/20 66.102.48.0/20 66.102.64.0/19 66.102.96.0/19 66.102.128.0/20 66.102.144.0/20 66.102.160.0/19 66.102.192.0/20 66.102.208.0/20 66.102.224.0/20 66.102.240.0/20 66.103.0.0/20 66.103.16.0/20 66.103.32.0/19 66.103.64.0/19 66.103.96.0/20 66.103.112.0/20 66.103.128.0/19 66.103.160.0/19 66.103.192.0/19 66.103.224.0/19 66.104.0.0/14 66.108.0.0/16 66.109.0.0/20 66.109.16.0/20 66.109.32.0/19 66.109.64.0/20 66.109.80.0/20 66.109.96.0/20 66.109.112.0/21 66.109.120.0/21 66.109.128.0/19 66.109.160.0/19 66.109.192.0/20 66.109.208.0/20 66.109.224.0/19 66.110.0.0/17 66.110.128.0/19 66.110.160.0/20 66.110.176.0/20 66.110.192.0/19 66.110.224.0/19 66.111.0.0/20 66.111.16.0/20 66.111.32.0/20 66.111.48.0/22 66.111.52.0/22 66.111.56.0/21 66.111.64.0/19 66.111.96.0/20 66.111.112.0/20 66.111.128.0/18 66.111.192.0/18 66.112.0.0/17 66.112.128.0/20 66.112.144.0/20 66.112.160.0/20 66.112.176.0/20 66.112.192.0/20 66.112.208.0/20 66.112.224.0/19 66.113.0.0/19 66.113.32.0/19 66.113.64.0/19 66.113.96.0/20 66.113.112.0/20 66.113.128.0/17 66.114.0.0/19 66.114.32.0/20 66.114.48.0/20 66.114.64.0/19 66.114.96.0/19 66.114.128.0/19 66.114.160.0/20 66.114.176.0/20 66.114.192.0/18 66.115.0.0/18 66.115.64.0/20 66.115.80.0/20 66.115.96.0/19 66.115.128.0/18 66.115.192.0/18 66.116.0.0/18 66.116.64.0/20 66.116.80.0/20 66.116.96.0/19 66.116.128.0/17 66.117.0.0/20 66.117.16.0/20 66.117.32.0/19 66.117.64.0/19 66.117.96.0/20 66.117.112.0/20 66.117.128.0/19 66.117.160.0/19 66.117.192.0/18 66.118.64.0/19 66.118.96.0/20 66.118.112.0/20 66.118.128.0/18 66.118.192.0/19 66.119.0.0/19 66.119.32.0/20 66.119.48.0/20 66.119.64.0/19 66.119.96.0/20 66.119.112.0/24 66.119.113.0/24 66.119.114.0/23 66.119.116.0/23 66.119.118.0/24 66.119.119.0/24 66.119.120.0/22 66.119.124.0/22 66.119.128.0/20 66.119.144.0/20 66.119.160.0/19 66.119.192.0/19 66.119.224.0/20 66.119.240.0/20 66.120.0.0/13 66.128.0.0/20 66.128.16.0/20 66.128.32.0/20 66.128.48.0/20 66.128.64.0/20 66.128.80.0/20 66.128.96.0/19 66.128.128.0/20 66.128.144.0/20 66.128.160.0/19 66.128.192.0/20 66.128.208.0/20 66.128.224.0/20 66.128.240.0/20 66.129.0.0/19 66.129.32.0/20 66.129.48.0/20 66.129.64.0/18 66.129.128.0/19 66.129.160.0/20 66.129.176.0/20 66.129.192.0/19 66.129.224.0/19 66.130.0.0/15 66.132.0.0/17 66.132.128.0/17 66.133.0.0/22 66.133.4.0/23 66.133.6.0/24 66.133.7.0/24 66.133.8.0/24 66.133.9.0/24 66.133.10.0/23 66.133.12.0/24 66.133.13.0/24 66.133.14.0/23 66.133.16.0/20 66.133.32.0/20 66.133.48.0/21 66.133.56.0/24 66.133.57.0/24 66.133.58.0/23 66.133.60.0/22 66.133.64.0/21 66.133.72.0/21 66.133.80.0/20 66.133.96.0/19 66.133.128.0/18 66.133.192.0/18 66.134.0.0/16 66.135.0.0/19 66.135.32.0/19 66.135.64.0/19 66.135.96.0/19 66.135.128.0/18 66.135.192.0/19 66.135.224.0/19 66.136.0.0/13 66.144.0.0/15 66.146.0.0/17 66.146.128.0/19 66.146.160.0/19 66.146.192.0/19 66.146.224.0/20 66.146.240.0/20 66.147.0.0/17 66.147.128.0/18 66.147.192.0/19 66.147.224.0/20 66.147.240.0/20 66.148.0.0/18 66.148.64.0/18 66.148.128.0/17 66.149.0.0/16 66.150.0.0/15 66.152.0.0/18 66.152.64.0/19 66.152.96.0/20 66.152.112.0/20 66.152.128.0/19 66.152.160.0/19 66.152.192.0/18 66.153.0.0/17 66.153.128.0/17 66.154.0.0/18 66.154.64.0/19 66.154.96.0/19 66.154.128.0/17 66.155.0.0/17 66.155.128.0/17 66.156.0.0/15 66.158.0.0/17 66.158.128.0/19 66.158.160.0/20 66.158.176.0/20 66.158.192.0/18 66.159.0.0/19 66.159.32.0/20 66.159.48.0/20 66.159.64.0/19 66.159.96.0/23 66.159.98.0/23 66.159.100.0/23 66.159.102.0/23 66.159.104.0/23 66.159.106.0/23 66.159.108.0/22 66.159.112.0/20 66.159.128.0/18 66.159.192.0/18 66.160.0.0/17 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