1. All IP Ranges
  2. 66.0.0.0/8
  3. 66.99.0.0/16
  4. AS6325  | 66.99.128.0/17

66.99.128.0/17

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:      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:      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:      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:      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 66.99.128.0/17

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

BGP prefixes that are contained by 66.99.128.0/17

Range ASN Company Num of IPs
66.99.209.0/24 AS6325 PALATINE CCSD 15 256
66.99.240.0/23 AS46286 COOK COUNTY 512

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 47 domain names hosted across 24 IP addresses 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
Read more

Pingable IPs

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

IP Address ASN Details
66.99.253.225 AS6325 Illinois Century Network 2.03ms from Chicago, US
66.99.230.3 AS6325 Illinois Century Network 2.50ms from Chicago, US
66.99.217.97 AS6325 Illinois Century Network 3.52ms from Chicago, US
66.99.130.8 AS6325 Illinois Century Network 7.19ms from Chicago, US
66.99.193.2 AS6325 Illinois Century Network 4.54ms from Chicago, US
66.99.170.193 AS6325 Illinois Century Network 7.29ms from Chicago, US
66.99.169.106 AS6325 Illinois Century Network 6.80ms from Chicago, US
66.99.202.1 AS6325 Illinois Century Network 3.86ms from Chicago, US
66.99.143.4 AS6325 Illinois Century Network 4.99ms from Chicago, US
66.99.224.226 AS6325 Illinois Century Network 1.08ms from Chicago, US
66.99.237.129 AS6325 Illinois Century Network 2.48ms from Chicago, US
66.99.248.1 AS6325 Illinois Century Network 2.86ms from Chicago, US
66.99.191.201 AS6325 Illinois Century Network 10.72ms from Chicago, US
66.99.233.126 AS6325 Illinois Century Network 3.65ms from Chicago, US
66.99.236.1 AS6325 Illinois Century Network 1.73ms from Chicago, US
66.99.190.202 AS6325 Illinois Century Network 7.66ms from Chicago, US
66.99.246.130 AS6325 Illinois Century Network 0.92ms from Chicago, US
66.99.250.176 AS6325 Illinois Century Network 2.27ms from Chicago, US
66.99.140.217 AS6325 Illinois Century Network 5.21ms from Chicago, US
66.99.209.87 AS6325 Illinois Century Network 2.45ms from Chicago, US
66.99.192.225 AS6325 Illinois Century Network 8.87ms from Chicago, US
66.99.159.121 AS6325 Illinois Century Network 9.24ms from Chicago, US
66.99.240.1 AS46286 Cook County 0.54ms from Chicago, US
66.99.223.250 AS6325 Illinois Century Network 2.69ms from Chicago, US
66.99.129.193 AS6325 Illinois Century Network 7.22ms 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
192.133.99.1 AS2901 Oso Grande Technologies, Inc. 0.22ms from Albuquerque, US
212.237.20.161 AS31034 Aruba S.p.A. 0.34ms from Arezzo, IT
207.114.48.1 AS17054 Expedient 3.88ms from Ashburn, US
171.96.202.1 AS17552 True Online 2.33ms from Bangkok, TH
1.20.153.1 AS23969 TOT Public Company Limited 12.14ms from Bangkok, TH
221.128.92.209 AS4765 Pacific Internet Pte Ltd 0.33ms from Bangkok, TH
120.3.96.1 AS4837 CHINA UNICOM China169 Backbone 14.79ms from Beijing, CN
71.232.236.1 AS7922 Comcast Cable Communications, LLC 2.54ms from Boston, US
2.81.251.1 AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 5.97ms from Braga, PT
213.213.238.1 AS12392 VOO S.A. 2.86ms from Brussels, BE
84.196.101.49 AS6848 Telenet BV 6.29ms from Brussels, BE
91.83.160.1 AS213455 Alfold.NET Ltd. 3.99ms from Budapest, HU
186.158.40.1 AS11664 Techtel LMDS Comunicaciones Interactivas S.A. 1.54ms from Buenos Aires, AR
71.13.50.1 AS20115 Charter Communications LLC 6.50ms from Chicago, US
63.158.69.145 AS209 CenturyLink Communications, LLC 11.23ms from Chicago, US
67.128.214.241 AS209 CenturyLink Communications, LLC 8.38ms from Chicago, US
155.254.205.1 AS39978 REED SMITH LLP 0.31ms from Chicago, US
202.0.37.1 AS4768 One New Zealand Group Limited 11.36ms from Christchurch, NZ
35.193.101.241 AS396982 Google LLC 0.12ms from Council Bluffs, US
70.122.182.1 AS11427 Charter Communications Inc 5.66ms from Dallas, US
69.134.146.1 AS7843 Charter Communications Inc 14.28ms from Dallas, US
86.30.158.1 AS5089 Virgin Media Limited 6.71ms from Dublin, IE
109.122.20.49 AS16276 OVH SAS 1.11ms from Frankfurt am Main, DE
1.191.127.1 AS4837 CHINA UNICOM China169 Backbone 4.75ms from Harbin, CN
165.84.161.225 AS10103 HK Broadband Network Ltd. 0.53ms from Hong Kong, HK

Traceroute

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

$
traceroute -a -n -q1 -m6 66.99.208.126
traceroute to 66.99.208.126 (66.99.208.126): 6 hops max, 52 byte packets
2 *
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Cayenne, GF
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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