1. All IP Ranges
  2. 66.0.0.0/8
  3. 66.99.0.0/16
  4. AS6325  | 66.99.0.0/17

66.99.0.0/17

AS6325  ·  Illinois Century Network

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Summary

Country United States
Domain illinois.gov
ASN AS6325
Parent Range 66.99.0.0/16
Registry ARIN
ID ICN7

WHOIS Details

NetHandle:      NET-66-99-0-0-1
OrgID:          ILTN
Parent:         NET-66-0-0-0-0
NetName:        ICN7
NetRange:       66.99.0.0 - 66.99.255.255
NetType:        allocation
RegDate:        2001-04-09
Updated:        2015-11-16
TechHandle:     ZI83-ARIN
Source:         ARIN


OrgID:          ILTN
OrgName:        Illinois Century Network
CanAllocate:    
Street:         120 W Jefferson
Street:         Suite B
City:           Springfield
State/Prov:     IL
Country:        US
PostalCode:     62702
RegDate:        1970-01-01
Updated:        2025-09-24
ReferralServer: rwhois://rwhois.illinois.net:4321
OrgAdminHandle: ZI83-ARIN
OrgTechHandle:  RESER5-ARIN
OrgTechHandle:  WEBST193-ARIN
OrgTechHandle:  ZI83-ARIN
OrgAbuseHandle: ICNAB-ARIN
Source:         ARIN


POCHandle:      RESER5-ARIN
IsRole:         N
LastName:       Reserva
FirstName:      Chuck
Street:         120 West Jefferson, Springfield, Illinois, 62702
City:           Springfield
State/Prov:     IL
Country:        US
PostalCode:     62702
RegDate:        2025-09-23
Updated:        2025-09-23
OfficePhone:    +1-217-786-8872
Mailbox:        chuck.reserva@illinois.gov
Source:         ARIN


POCHandle:      ICNAB-ARIN
IsRole:         Y
LastName:       ICN Abuse
FirstName:      
Street:         120 W Jefferson
Street:         Suite B
City:           Springfield
State/Prov:     IL
Country:        US
PostalCode:     62702
RegDate:        2003-10-09
Updated:        2025-07-21
OfficePhone:    +1-217-524-3648
Mailbox:        doit.security@illinois.gov
Source:         ARIN


POCHandle:      WEBST193-ARIN
IsRole:         N
LastName:       Webster
FirstName:      Andrew
Street:         120 W Jefferson St
City:           Springfield
State/Prov:     IL
Country:        US
PostalCode:     62702
RegDate:        2025-07-21
Updated:        2025-07-21
OfficePhone:    +1-217-558-1106
Mailbox:        andy.webster@illinois.gov
Source:         ARIN


POCHandle:      ZI83-ARIN
IsRole:         Y
LastName:       Hostmaster
FirstName:      
Street:         120 W Jefferson
Street:         Suite B
City:           Springfield
State/Prov:     IL
Country:        US
PostalCode:     62702
RegDate:        2001-10-31
Updated:        2025-05-29
OfficePhone:    +1-815-936-4643
MobilePhone:    +1-779-801-4071
Mailbox:        DoIT.ICN.Hostmasternet@illinois.gov
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 66.99.0.0/17

Range ASN Company Num of IPs
66.99.0.0/16 AS6325 Illinois Century Network 65,536

BGP prefixes that are contained by 66.99.0.0/17

Range ASN Company Num of IPs
66.99.5.0/24 AS19480 HAROLD WASHINGTON LIBRARY CENTER 256
66.99.51.0/24 AS6325 MANNHEIM SD 83 256

Nearby Ranges

BGP prefixes that overlap with 66.99.0.0/16

Range ASN Company Num of IPs
66.99.0.0/16 AS6325 Illinois Century Network 65,536
66.99.240.0/23 AS46286 COOK COUNTY 512
66.99.5.0/24 AS19480 HAROLD WASHINGTON LIBRARY CENTER 256
66.99.209.0/24 AS6325 PALATINE CCSD 15 256
66.99.51.0/24 AS6325 MANNHEIM SD 83 256

Hosted domains

There are 31 domain names hosted across 15 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
66.99.100.137 theautismprogram.us 6
66.99.8.45 luthed.com 2
66.99.64.37 renooffice.com 2
66.99.76.90 kenzuhan.art 1
66.99.47.4 wheatonpl.org 1
66.99.70.70 stmarys.k12.il.us 1
66.99.127.3 noble.k12.il.us 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
Read more

Pingable IPs

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

IP Address ASN Details
66.99.27.161 AS6325 Illinois Century Network 0.74ms from Chicago, US
66.99.23.2 AS6325 Illinois Century Network 1.75ms from Chicago, US
66.99.13.247 AS6325 Illinois Century Network 1.35ms from Chicago, US
66.99.20.65 AS6325 Illinois Century Network 2.37ms from Chicago, US
66.99.28.99 AS6325 Illinois Century Network 1.67ms from Chicago, US
66.99.22.161 AS6325 Illinois Century Network 3.63ms from Chicago, US
66.99.29.18 AS6325 Illinois Century Network 2.13ms from Chicago, US
66.99.15.19 AS6325 Illinois Century Network 1.54ms from Chicago, US
66.99.25.97 AS6325 Illinois Century Network 3.29ms from Chicago, US
66.99.8.1 AS6325 Illinois Century Network 2.13ms from Chicago, US
66.99.5.166 AS19480 CHICAGO PUBLIC LIBRARY 0.92ms from Chicago, US
66.99.14.36 AS6325 Illinois Century Network 1.62ms from Chicago, US
66.99.48.136 AS6325 Illinois Century Network 2.29ms from Chicago, US
66.99.51.254 AS6325 Illinois Century Network 2.94ms from Chicago, US
66.99.93.193 AS6325 Illinois Century Network 1.63ms from Chicago, US
66.99.54.242 AS6325 Illinois Century Network 1.60ms from Chicago, US
66.99.90.65 AS6325 Illinois Century Network 1.17ms from Chicago, US
66.99.45.33 AS6325 Illinois Century Network 2.50ms from Chicago, US
66.99.56.2 AS6325 Illinois Century Network 1.32ms from Chicago, US
66.99.124.29 AS6325 Illinois Century Network 3.05ms from Chicago, US
66.99.120.66 AS6325 Illinois Century Network 1.33ms from Chicago, US
66.99.55.33 AS6325 Illinois Century Network 1.23ms from Chicago, US
66.99.127.100 AS6325 Illinois Century Network 0.86ms from Chicago, US
66.99.101.227 AS6325 Illinois Century Network 4.88ms from Chicago, US
66.99.43.225 AS6325 Illinois Century Network 1.16ms from Chicago, 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
173.79.229.1 AS701 Verizon Business 2.28ms from Ashburn, US
73.52.116.1 AS7922 Comcast Cable Communications, LLC 14.69ms from Ashburn, US
142.154.145.1 AS13825 Troy Cablevision, Inc. 5.98ms from Atlanta, US
98.192.55.177 AS7922 Comcast Cable Communications, LLC 7.18ms from Atlanta, US
188.111.207.241 AS3209 Vodafone GmbH 4.65ms from Berlin, DE
190.146.215.1 AS10620 Telmex Colombia S.A. 9.39ms from Bogota, CO
82.155.174.1 AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 1.69ms from Braga, PT
186.23.97.1 AS27747 Telecentro S.A. 1.53ms from Buenos Aires, AR
221.206.114.1 AS4837 CHINA UNICOM China169 Backbone 13.15ms from Changchun, CN
220.170.178.129 AS4134 CHINANET-BACKBONE 2.37ms from Changsha, CN
220.202.111.129 AS4837 CHINA UNICOM China169 Backbone 3.56ms from Changsha, CN
117.173.243.129 AS9808 China Mobile Communications Group Co., Ltd. 3.27ms from Chengdu, CN
24.76.236.1 AS6327 Shaw Communications 16.07ms from Chicago, US
24.77.97.49 AS6327 Shaw Communications 18.01ms from Chicago, US
12.188.144.113 AS7018 AT&T Enterprises, LLC 1.33ms from Chicago, US
190.139.132.1 AS7303 Telecom Argentina S.A. 4.43ms from Cordoba, AR
175.151.100.1 AS4837 CHINA UNICOM China169 Backbone 18.97ms from Dalian, CN
38.67.36.1 AS18859 GVEC.net, LLC 8.14ms from Dallas, US
38.175.239.145 AS18859 GVEC.net, LLC 10.37ms from Dallas, US
209.207.40.1 AS19108 Optimum 6.06ms from Dallas, US
103.77.18.209 AS135628 PC-Net 0.60ms from Dhaka, BD
178.153.167.129 AS8781 Ooredoo Q.S.C. 0.17ms from Doha, QA
78.101.204.129 AS8781 Ooredoo Q.S.C. 0.23ms from Doha, QA
75.158.33.1 AS852 TELUS Communications Inc. 2.54ms from Edmonton, CA
79.255.205.113 AS3320 Deutsche Telekom AG 4.49ms from Frankfurt am Main, DE

Traceroute

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

$
traceroute -a -n -q1 -m5 66.99.26.91
traceroute to 66.99.26.91 (66.99.26.91): 5 hops max, 52 byte packets
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Council Bluffs, US
On

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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