66.99.128.0/18

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:      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:      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 66.99.128.0/18

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

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 39 domain names hosted across 17 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
66.99.138.100	hancock.k12.il.us	15
66.99.142.47	whois.cc.il.us	6
66.99.170.26	swic.edu	4
66.99.140.49	ghsonline.net	1
66.99.140.8	bcsd5.org	1
66.99.138.97	roe51.k12.il.us	1
66.99.138.92	roe27.k12.il.us	1
66.99.191.195	roxana.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

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

IP Address	ASN	Details
66.99.155.6	AS6325 Illinois Century Network	`9.23ms` from Chicago, US
66.99.159.121	AS6325 Illinois Century Network	`9.25ms` from Chicago, US
66.99.140.217	AS6325 Illinois Century Network	`5.10ms` from Chicago, US
66.99.191.209	AS6325 Illinois Century Network	`10.81ms` from Chicago, US
66.99.130.8	AS6325 Illinois Century Network	`7.25ms` from Chicago, US
66.99.169.106	AS6325 Illinois Century Network	`6.81ms` from Chicago, US
66.99.190.202	AS6325 Illinois Century Network	`7.66ms` from Chicago, US
66.99.129.193	AS6325 Illinois Century Network	`7.20ms` from Chicago, US
66.99.180.163	AS6325 Illinois Century Network	`7.35ms` from Chicago, US
66.99.128.136	AS6325 Illinois Century Network	`7.40ms` from Chicago, US
66.99.142.170	AS6325 Illinois Century Network	`15.12ms` from Detroit, US
66.99.170.193	AS6325 Illinois Century Network	`7.30ms` from Chicago, US
66.99.143.3	AS6325 Illinois Century Network	`5.08ms` 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
3.215.20.98	AS14618 Amazon.com, Inc.	`0.57ms` from Ashburn, US
206.187.99.34	AS20141 Quality Technology Services, LLC	`0.50ms` from Atlanta, US
96.109.81.210	AS7922 Comcast Cable Communications, LLC	`0.60ms` from Atlanta, US
196.92.208.210	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`7.40ms` from Casablanca, MA
196.117.176.2	AS36925 MEDITELECOM	`2.13ms` from Casablanca, MA
208.78.95.50	AS40539 Hosting Consulting, Inc	`0.74ms` from Chicago, US
117.219.1.194	AS9829 National Internet Backbone	`6.96ms` from Delhi, IN
172.173.71.50	AS8075 Microsoft Corporation	`0.24ms` from Des Moines, US
89.101.217.194	AS6830 Liberty Global Europe Holding B.V.	`5.60ms` from Dublin, IE
87.190.29.50	AS3320 Deutsche Telekom AG	`1.34ms` from Frankfurt am Main, DE
212.147.13.194	AS12350 VTX Services SA	`1.06ms` from Geneve, CH
58.101.115.2	AS24139 Huashu media&Network Limited	`6.31ms` from Hangzhou, CN
87.92.0.2	AS16086 DNA Oyj	`0.71ms` from Helsinki, FI
16.78.77.130	AS16509 Amazon.com, Inc.	`0.13ms` from Jakarta, ID
108.65.187.66	AS7018 AT&T Enterprises, LLC	`17.27ms` from Los Angeles, US
24.37.113.162	AS5769 Videotron Ltee	`3.06ms` from Montreal, CA
193.149.115.114	AS5436 Computacenter France SAS	`1.94ms` from Paris, FR
65.74.150.2	AS17018 Quality Technology Services, LLC	`3.82ms` from San Jose, US
179.251.62.34	AS26615 TIM S/A	`2.76ms` from Sao Paulo, BR
50.248.169.114	AS7922 Comcast Cable Communications, LLC	`6.83ms` from Secaucus, US
82.196.118.130	AS8473 Bahnhof AB	`0.96ms` from Stockholm, SE
199.250.184.18	AS63109 Four County Electric Membership Corporation	`6.09ms` from Charlotte, US
207.161.203.130	AS7122 Bell Canada	`16.23ms` from Chicago, US
202.181.224.114	AS7540 HongKong Commercial Internet Exchange	`0.23ms` from Hong Kong, HK
194.72.150.210	AS2856 British Telecommunications PLC	`2.08ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -m7 66.99.136.195

traceroute to 66.99.136.195 (66.99.136.195): 7 hops max, 52 byte packets

1 [AS15169] 172.253.65.182 93.827 ms

2 [AS15169] 192.178.249.238 93.706 ms

3 *

4 [AS6325] 206.166.35.65 104.156 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Brussels, BE

On December 28th 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.

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