1. All IP Ranges
  2. 66.0.0.0/8
  3. 66.99.0.0/16
  4. AS6325  | 66.99.0.0/18

66.99.0.0/18

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:      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


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:      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

Overlapping Ranges

BGP prefixes that contain 66.99.0.0/18

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

BGP prefixes that are contained by 66.99.0.0/18

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 11 domain names hosted across 9 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
66.99.11.12 cuchicago.edu 2
66.99.8.45 luthed.net 2
66.99.47.4 wheatonpl.org 1
66.99.22.180 besd61.k12.il.us 1
66.99.11.76 adsfa.ltd 1
66.99.8.73 icns.net 1
66.99.19.10 prairieg.k12.il.us 1
66.99.47.25 wheaton.lib.il.us 1
66.99.53.148 yorkville.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

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

IP Address ASN Details
66.99.54.231 AS6325 Illinois Century Network 1.46ms from Chicago, US
66.99.5.166 AS19480 CHICAGO PUBLIC LIBRARY 0.86ms from Chicago, US
66.99.8.3 AS6325 Illinois Century Network 2.15ms from Chicago, US
66.99.15.122 AS6325 Illinois Century Network 1.38ms from Chicago, US
66.99.50.129 AS6325 Illinois Century Network 0.97ms from Chicago, US
66.99.59.1 AS6325 Illinois Century Network 1.59ms from Chicago, US
66.99.56.1 AS6325 Illinois Century Network 1.30ms from Chicago, US
66.99.27.161 AS6325 Illinois Century Network 0.73ms from Chicago, US
66.99.39.162 AS6325 Illinois Century Network 2.11ms from Chicago, US
66.99.11.173 AS6325 Illinois Century Network 2.25ms from Chicago, US
66.99.22.161 AS6325 Illinois Century Network 3.61ms from Chicago, US
66.99.14.38 AS6325 Illinois Century Network 1.48ms from Chicago, US
66.99.10.14 AS6325 Illinois Century Network 2.24ms from Chicago, US
66.99.25.97 AS6325 Illinois Century Network 3.31ms from Chicago, US
66.99.28.99 AS6325 Illinois Century Network 1.66ms from Chicago, US
66.99.20.65 AS6325 Illinois Century Network 2.36ms from Chicago, US
66.99.51.1 AS6325 Illinois Century Network 2.92ms from Chicago, US
66.99.48.20 AS6325 Illinois Century Network 2.23ms from Chicago, US
66.99.47.1 AS6325 Illinois Century Network 3.07ms from Chicago, US
66.99.13.248 AS6325 Illinois Century Network 1.58ms from Chicago, US
66.99.43.225 AS6325 Illinois Century Network 1.17ms from Chicago, US
66.99.23.2 AS6325 Illinois Century Network 1.75ms from Chicago, US
66.99.55.33 AS6325 Illinois Century Network 1.19ms from Chicago, US
66.99.45.62 AS6325 Illinois Century Network 1.91ms from Chicago, US
66.99.58.33 AS6325 Illinois Century Network 2.63ms 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
20.82.23.178 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
97.146.102.18 AS6167 Verizon Business 12.14ms from Ashburn, US
98.62.93.130 AS7922 Comcast Cable Communications, LLC 4.00ms from Atlanta, US
150.164.15.194 AS271354 UNIVERSIDADE FEDERAL DE MINAS GERAIS 1.05ms from Belo Horizonte, BR
97.224.55.242 AS6167 Verizon Business 11.70ms from Chicago, US
68.87.86.2 AS7922 Comcast Cable Communications, LLC 2.00ms from Denver, US
34.247.201.146 AS16509 Amazon.com, Inc. 0.22ms from Dublin, IE
200.202.206.130 AS7738 V tal 2.98ms from Fortaleza, BR
35.156.227.50 AS16509 Amazon.com, Inc. 0.16ms from Frankfurt am Main, DE
58.255.16.34 AS17816 China Unicom IP network China169 Guangdong province 3.02ms from Guangzhou, CN
122.46.75.130 AS17858 LG POWERCOMM 2.49ms from Incheon, KR
178.74.235.66 AS49223 EVEREST TV AND RADIO COMPANY LLC 2.71ms from Kyiv, UA
111.68.105.34 AS45773 PERN AS Content Servie Provider, Islamabad, Pakistan 1.95ms from Lahore, PK
88.21.12.2 AS3352 TELEFONICA DE ESPANA S.A.U. 9.21ms from Madrid, ES
142.17.60.194 AS611 NB-PEI Educational Computer Network 15.58ms from Montreal, CA
153.177.196.242 AS4713 NTT DOCOMO BUSINESS,Inc. 5.69ms from Osaka, JP
90.91.238.194 AS3215 Orange S.A. 1.57ms from Paris, FR
97.136.162.18 AS6167 Verizon Business 14.30ms from San Jose, US
76.28.198.226 AS7922 Comcast Cable Communications, LLC 5.79ms from Seattle, US
40.125.170.178 AS58593 Shanghai Blue Cloud Technology Co.,Ltd 2.67ms from Tianjin, CN
113.36.193.226 AS17506 ARTERIA Networks Corporation 1.02ms from Tokyo, JP
121.114.117.146 AS4713 NTT DOCOMO BUSINESS,Inc. 3.46ms from Tokyo, JP
24.50.56.18 AS7992 Cogeco Connexion Inc. 1.12ms from Toronto, CA
89.231.247.66 AS21021 Multimedia Polska Sp. z o.o. 8.34ms from Warsaw, PL
72.237.88.226 AS40047 Intermediate Unit 1 9.00ms from Ashburn, US

Traceroute

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

$
traceroute -a -n -q1 -f3 66.99.47.1
traceroute to 66.99.47.1 (66.99.47.1): 64 hops max, 52 byte packets
3 [] 91.200.241.50 19.473 ms
4 [] 195.66.225.227 27.233 ms
5 [AS6461] 64.125.28.214 103.012 ms
6 [AS6461] 64.125.20.127 102.745 ms
7 [AS6461] 64.125.31.110 103.335 ms
8 *
9 *
10 [AS6461] 209.249.44.186 102.911 ms
11 [AS6325] 206.166.9.209 103.481 ms
12 *
13 [AS6325] 206.166.35.13 107.034 ms
14 [AS6325] 66.99.47.1 105.437 ms
Measurement taken from IPinfo ProbeNet in Duesseldorf, DE
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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