66.18.104.0/24

AS13649 · Flexential Colorado Corp.

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Summary

Country	United States
Domain	amsurg.com
ASN	AS13649
Parent Range	66.18.96.0/19
Registry	ARIN
ID	RAF-66-18-104-0

WHOIS Details

NetHandle:      NET-66-18-104-0-1
OrgID:          C00831772
Parent:         NET-66-18-96-0-1
NetName:        RAF-66-18-104-0
NetRange:       66.18.104.0 - 66.18.104.255
NetType:        reassignment
RegDate:        2004-05-27
Updated:        2010-11-02
Source:         ARIN


OrgID:          C00831772
OrgName:        Amsurg
CanAllocate:    
Street:         20 Burton Hills Boulevard
Street:         Suite 500
City:           Nashville
State/Prov:     TN
Country:        US
PostalCode:     37215
RegDate:        2004-05-27
Updated:        2011-03-19
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 66.18.104.0/24

Range	ASN	Company	Num of IPs
66.18.96.0/19	AS13649	Flexential Corp.	8,192

Nearby Ranges

BGP prefixes that overlap with 66.18.0.0/16

Range	ASN	Company	Num of IPs
66.18.192.0/18	AS26546	FIBERNETICS CORPORATION	16,384
66.18.96.0/19	AS13649	Flexential Corp.	8,192
66.18.32.0/19	AS26827	EPB Fiber Optics	8,192
66.18.160.0/20	AS11711	TULAROSA COMMUNICATIONS, INC.	4,096
66.18.0.0/20	AS13767	DataBank Holdings, Ltd.	4,096
66.18.176.0/20	AS16564	Adamswells Internet	4,096
66.18.16.0/20	AS6547	DCT Technologies, Inc.	4,096
66.18.11.0/24	AS13767	Presage Solutions, LLC	256
66.18.95.0/24	AS206283	Sentech SOC Ltd	256
66.18.116.0/24	AS13649	PureWorks, Inc.	256
66.18.114.0/24	AS13649	Rivals.com	256
66.18.10.0/24	AS13767	SEWELL AUTOMOTIVE COMPANIES	256

Hosted domains

There are 7 domain names hosted across 6 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
66.18.104.15	nationalsurgicalcare.com	2
66.18.104.200	amsurgemail.com	1
66.18.104.249	amsurg2k.com	1
66.18.104.22	phishingedu.com	1
66.18.104.36	amsurgonline.com	1
66.18.104.17	amsurgadmin.com	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

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Pingable IPs

5 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
66.18.104.5	AS13649 Flexential Colorado Corp.	`9.78ms` from Atlanta, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
212.108.19.8	AS5400 British Telecommunications PLC	`1.42ms` from Amsterdam, NL
75.90.129.88	AS7029 Windstream Communications LLC	`10.24ms` from Ashburn, US
54.218.218.232	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
24.74.116.8	AS11426 Charter Communications Inc	`7.25ms` from Charlotte, US
69.245.188.200	AS7922 Comcast Cable Communications, LLC	`5.11ms` from Chicago, US
91.206.99.136	AS25068 Konica Minolta Business Solutions Europe GmbH	`6.46ms` from Duesseldorf, DE
217.87.215.8	AS3320 Deutsche Telekom AG	`10.23ms` from Frankfurt am Main, DE
90.213.15.104	AS5607 Sky UK Limited	`10.30ms` from London, GB
92.241.17.152	AS51200 LLC Digital Dialogue-Nets	`14.89ms` from Moscow, RU
124.227.238.168	AS4134 CHINANET-BACKBONE	`6.01ms` from Nanning, CN
126.142.145.104	AS17676 SoftBank Corp.	`4.05ms` from Osaka, JP
177.81.144.40	AS28573 Claro NXT Telecomunicacoes Ltda	`4.83ms` from Osasco, BR
189.250.57.136	AS8151 UNINET	`9.78ms` from Santiago de Queretaro, MX
187.170.164.56	AS8151 UNINET	`3.79ms` from Santiago de Queretaro, MX
175.227.129.56	AS4766 Korea Telecom	`7.16ms` from Seoul, KR
8.141.55.168	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.85ms` from Beijing, CN
157.137.239.24	AS31898 Oracle Corporation	`0.15ms` from Bogota, CO
64.107.110.216	AS6325 Illinois Century Network	`5.13ms` from Chicago, US
58.144.222.8	AS4837 CHINA UNICOM China169 Backbone	`0.45ms` from Chongqing, CN
194.116.236.56	AS44382 Fiba Cloud Operation Company, LLC	`0.34ms` from Istanbul, TR
52.108.154.8	AS8075 Microsoft Corporation	`0.19ms` from Kuala Lumpur, MY
82.32.131.152	AS5089 Virgin Media Limited	`7.56ms` from London, GB
90.202.57.248	AS5607 Sky UK Limited	`5.53ms` from London, GB
14.2.158.8	AS4739 Internode Pty Ltd	`12.73ms` from Melbourne, AU
126.82.75.184	AS17676 SoftBank Corp.	`10.99ms` from Osaka, JP

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f3 66.18.104.5

traceroute to 66.18.104.5 (66.18.104.5): 64 hops max, 52 byte packets

3 [AS3257] 208.97.209.217 4.929 ms

4 [AS3257] 72.29.214.173 1.169 ms

5 [AS13649] 148.66.237.197 18.862 ms

6 [AS13649] 148.66.239.19 19.149 ms

7 [AS13649] 148.66.238.19 19.108 ms

8 [AS13649] 148.66.237.240 19.017 ms

9 [AS13649] 148.66.239.125 18.877 ms

10 [AS13649] 66.18.104.5 18.633 ms

Measurement taken from

IPinfo ProbeNet in Chicago, US

On January 18th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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