66.128.221.0/24

AS32022 · Children's Hospital Colorado

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Summary

Country	United States
Domain	childrenscolorado.org
ASN	AS32022
Parent Range	66.128.208.0/20
Registry	ARIN
ID	CHC-66-128-208-NET

WHOIS Details

NetHandle:      NET-66-128-208-0-1
OrgID:          CHD
Parent:         NET-66-0-0-0-0
NetName:        CHC-66-128-208-NET
NetRange:       66.128.208.0 - 66.128.223.255
NetType:        allocation
RegDate:        2004-02-27
Updated:        2021-12-14
TechHandle:     NETWO4188-ARIN
Source:         ARIN


OrgID:          CHD
OrgName:        Children's Hospital Colorado
CanAllocate:    
Street:         Corporate Compliance Box 450
Street:         13123 East 16th Ave
City:           Aurora
State/Prov:     CO
Country:        US
PostalCode:     80046
RegDate:        1993-01-12
Updated:        2013-02-07
OrgAdminHandle: NETWO4188-ARIN
OrgTechHandle:  NETWO4188-ARIN
OrgAbuseHandle: NETWO4188-ARIN
OrgNOCHandle:   NETWO4188-ARIN
Source:         ARIN


POCHandle:      NETWO4188-ARIN
IsRole:         Y
LastName:       Network Manager
FirstName:      
Street:         Children's Hospital Colorado
Street:         Anschutz Medical Campus
Street:         13123 East 16th Avenue
City:           Aurora
State/Prov:     CO
Country:        US
PostalCode:     80045
RegDate:        2011-02-11
Updated:        2025-03-28
OfficePhone:    +1-720-777-1234
Mailbox:        TCH-DNS-ADMIN@childrenscolorado.org
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 66.128.221.0/24

Range	ASN	Company	Num of IPs
66.128.208.0/20	AS32022	Children's Hospital Colorado	4,096

Nearby Ranges

BGP prefixes that overlap with 66.128.0.0/16

Range	ASN	Company	Num of IPs
66.128.96.0/19	AS20115	Charter Communications LLC	8,192
66.128.160.0/19	AS13576	SDN Communications Inc.	8,192
66.128.48.0/20	AS7819	Global IP Networks INC	4,096
66.128.80.0/20	AS22995	Xplore Inc.	4,096
66.128.32.0/20	AS263236	Itelsa	4,096
66.128.0.0/20	AS30666	Xchange Telecom Corp.	4,096
66.128.208.0/20	AS32022	Children's Hospital Colorado	4,096
66.128.224.0/20	AS3561	CenturyLink Communications, LLC	4,096
66.128.64.0/20	AS3561	CenturyLink Communications, LLC	4,096
66.128.240.0/20	AS40237	United Telephone Company	4,096
66.128.128.0/20	AS54665	Trailwave Fiber, Inc.	4,096
66.128.164.0/23	AS15204	ITC Telecom	512
66.128.184.0/23	AS15204	ITC Telecom	512
66.128.166.0/23	AS13576	Midstate communications	512
66.128.162.0/23	AS15204	ITC Telecom	512
66.128.171.0/24	AS13576	Valley Telecommunications	256
66.128.181.0/24	AS46566	CAPITAL SERVICES	256
66.128.189.0/24	AS395037	MNL-8	256
66.128.178.0/24	AS398112	Poet	256
66.128.177.0/24	AS398176	JDS Industries	256
66.128.182.0/24	AS15204	ITC Telecom	256
66.128.173.0/24	AS13576	Valley Telephone Company	256
66.128.174.0/24	AS13576	B-Y Internet, LLC	256
66.128.175.0/24	AS13576	Midstate communications	256
66.128.176.0/24	AS13576	COMMUNITY INTERNET SERVICE	256
66.128.179.0/24	AS13576	SDN-BCKB	256
66.128.183.0/24	AS15204	ITC Telecom	256
66.128.188.0/24	AS14675	PLAINS COMMERCE BANK	256
66.128.161.0/24	AS18785	Santel Communications Cooperative, Inc.	256

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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

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

IP Address	ASN	Details
66.128.221.8	AS32022 Children's Hospital Colorado	`0.47ms` from Denver, 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
58.179.242.40	AS9443 Vocus Retail	`2.69ms` from Adelaide, AU
43.208.37.216	AS16509 Amazon.com, Inc.	`1.57ms` from Bangkok, TH
173.174.116.136	AS11427 Charter Communications Inc	`10.63ms` from Dallas, US
103.175.232.24	AS149001 Shafi Enterprise	`4.06ms` from Dhaka, BD
18.184.128.184	AS16509 Amazon.com, Inc.	`0.15ms` from Frankfurt am Main, DE
87.186.15.136	AS3320 Deutsche Telekom AG	`7.50ms` from Frankfurt am Main, DE
213.78.49.104	AS13285 TalkTalk Communications Limited	`2.79ms` from Manchester, GB
20.70.76.168	AS8075 Microsoft Corporation	`0.65ms` from Melbourne, AU
79.200.16.104	AS3320 Deutsche Telekom AG	`9.13ms` from Nuernberg, DE
222.148.196.8	AS4713 NTT DOCOMO BUSINESS,Inc.	`14.96ms` from Osaka, JP
180.221.191.232	AS9617 JCOM Co., Ltd.	`1.29ms` from Osaka, JP
1.159.250.24	AS1221 Telstra Limited	`6.93ms` from Perth, AU
34.226.58.136	AS14618 Amazon.com, Inc.	`0.22ms` from Reston, US
115.136.151.72	AS17858 LG POWERCOMM	`2.89ms` from Seoul, KR
14.41.91.168	AS4766 Korea Telecom	`3.74ms` from Seoul, KR
222.128.120.184	AS4808 China Unicom Beijing Province Network	`4.49ms` from Tianjin, CN
96.45.193.200	AS21949 Beanfield Technologies Inc.	`0.26ms` from Toronto, CA
72.190.39.88	AS11427 Charter Communications Inc	`3.87ms` from Dallas, US
117.93.165.104	AS4134 CHINANET-BACKBONE	`7.11ms` from Huai'an, CN
217.43.146.168	AS2856 British Telecommunications PLC	`1.82ms` from London, GB
94.34.214.152	AS8612 Tiscali Italia S.P.A.	`8.82ms` from Milan, IT
202.191.181.120	AS9583 Sify Limited	`2.49ms` from Mumbai, IN
45.171.78.120	AS263527 SERRA GERAL SOLUCOES PARA INTERNET LTDA	`5.78ms` from Novo Hamburgo, BR
45.3.156.200	AS33363 Charter Communications, Inc	`1.67ms` from Orlando, US
20.27.69.8	AS8075 Microsoft Corporation	`0.29ms` 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 66.128.221.143

traceroute to 66.128.221.143 (66.128.221.143): 64 hops max, 52 byte packets

1 [AS40021] 209.126.0.11 0.19 ms

2 *

3 [AS3356] 4.69.207.57 15.844 ms

4 [AS3356] 63.211.240.90 16.235 ms

5 [AS32022] 66.128.223.243 20.603 ms

6 [AS32022] 66.128.221.143 20.732 ms

Measurement taken from

IPinfo ProbeNet in St. Louis, US

On November 14th 2025

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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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