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

66.99.0.0/16

AS6325  ·  Illinois Century Network

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Summary

Country United States
Domain illinois.gov
ASN AS6325
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 are contained by 66.99.0.0/16

Range ASN Company Num of IPs
66.99.209.0/24 AS6325 PALATINE CCSD 15 256
66.99.5.0/24 AS19480 HAROLD WASHINGTON LIBRARY CENTER 256
66.99.51.0/24 AS6325 MANNHEIM SD 83 256
66.99.240.0/23 AS46286 COOK COUNTY 512

Nearby Ranges

BGP prefixes that overlap with 66.0.0.0/8

Range ASN Company Num of IPs
66.120.0.0/13 AS7018 AT&T Enterprises, LLC 524,288
66.136.0.0/13 AS16788 AT&T Enterprises, LLC 524,288
66.120.0.0/13 AS22352 AT&T Enterprises, LLC 524,288
66.136.0.0/13 AS7018 AT&T Enterprises, LLC 524,288
66.192.0.0/14 AS33745 Level 3 Parent, LLC 262,144
66.12.0.0/14 AS701 Verizon Business 262,144
66.236.0.0/14 AS29819 Verizon Business 262,144
66.192.0.0/14 AS29707 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS29985 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS394171 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS3549 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS32617 Level 3 Parent, LLC 262,144
66.236.0.0/14 AS2828 Verizon Business 262,144
66.192.0.0/14 AS18929 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS400057 Level 3 Parent, LLC 262,144
66.104.0.0/14 AS2828 Verizon Business 262,144
66.192.0.0/14 AS13628 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS23314 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS13755 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS395760 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS395837 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS3356 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS32268 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS62478 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS394750 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS30258 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS14467 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS29921 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS35863 Level 3 Parent, LLC 262,144
66.192.0.0/14 AS11402 Level 3 Parent, LLC 262,144
66.74.0.0/15 AS20001 Charter Communications Inc 131,072
66.66.0.0/15 AS11351 Charter Communications Inc 131,072
66.20.0.0/15 AS6389 AT&T Enterprises, LLC 131,072
66.92.0.0/15 AS11696 GTT Americas, LLC 131,072
66.144.0.0/15 AS19902 Department of Administrative Services 131,072
66.68.0.0/15 AS11427 Charter Communications Inc 131,072
66.74.0.0/15 AS11427 Charter Communications Inc 131,072
66.130.0.0/15 AS5769 Videotron Ltee 131,072
66.100.0.0/15 AS27328 CenturyLink Communications, LLC 131,072
66.100.0.0/15 AS46854 CenturyLink Communications, LLC 131,072
66.30.0.0/15 AS7922 Comcast Cable Communications, LLC 131,072
66.74.0.0/15 AS7224 Charter Communications Inc 131,072
66.176.0.0/15 AS7922 Comcast Cable Communications, LLC 131,072
66.20.0.0/15 AS2386 AT&T Enterprises, LLC 131,072
66.2.0.0/15 AS2828 Verizon Business 131,072
66.88.0.0/15 AS2828 Verizon Business 131,072
66.20.0.0/15 AS23199 AT&T Enterprises, LLC 131,072
66.72.0.0/15 AS7018 AT&T Enterprises, LLC 131,072
66.166.0.0/15 AS3257 GTT Americas, LLC 131,072
66.92.0.0/15 AS3257 GTT Americas, LLC 131,072

Hosted domains

There are 78 domain names hosted across 38 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP

Hosted domains API

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Pingable IPs

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

IP Address ASN Details
66.99.217.97 AS6325 Illinois Century Network 3.49ms from Chicago, US
66.99.124.1 AS6325 Illinois Century Network 3.21ms from Chicago, US
66.99.229.1 AS6325 Illinois Century Network 1.23ms from Chicago, US
66.99.143.3 AS6325 Illinois Century Network 2.91ms from St. Louis, US
66.99.223.250 AS6325 Illinois Century Network 2.71ms from Chicago, US
66.99.216.2 AS6325 Illinois Century Network 0.81ms from Chicago, US
66.99.142.81 AS6325 Illinois Century Network 2.99ms from St. Louis, US
66.99.159.121 AS6325 Illinois Century Network 8.95ms from Chicago, US
66.99.130.8 AS6325 Illinois Century Network 7.33ms from Chicago, US
66.99.230.3 AS6325 Illinois Century Network 2.46ms from Chicago, US
66.99.240.1 AS46286 Cook County 0.56ms from Chicago, US
66.99.128.136 AS6325 Illinois Century Network 7.55ms from Chicago, US
66.99.155.6 AS6325 Illinois Century Network 8.93ms from Chicago, US
66.99.192.225 AS6325 Illinois Century Network 8.92ms from Chicago, US
66.99.224.225 AS6325 Illinois Century Network 1.10ms from Chicago, US
66.99.191.201 AS6325 Illinois Century Network 10.80ms from Chicago, US
66.99.252.209 AS6325 Illinois Century Network 1.92ms from Chicago, US
66.99.203.55 AS6325 Illinois Century Network 3.88ms from Chicago, US
66.99.193.17 AS6325 Illinois Century Network 3.19ms from St. Louis, US
66.99.129.193 AS6325 Illinois Century Network 7.34ms from Chicago, US
66.99.180.163 AS6325 Illinois Century Network 7.41ms from Chicago, US
66.99.190.202 AS6325 Illinois Century Network 7.73ms from Chicago, US
66.99.127.100 AS6325 Illinois Century Network 0.91ms from Chicago, US
66.99.246.130 AS6325 Illinois Century Network 0.96ms from Chicago, US
66.99.169.106 AS6325 Illinois Century Network 6.88ms 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
71.63.51.176 AS7922 Comcast Cable Communications, LLC 6.73ms from Ashburn, US
113.205.211.32 AS4837 CHINA UNICOM China169 Backbone 3.28ms from Chongqing, CN
77.225.12.32 AS12430 VODAFONE ESPANA S.A.U. 1.51ms from Madrid, ES
76.180.115.0 AS11351 Charter Communications Inc 19.79ms from Morris Plains, US
73.25.35.208 AS7922 Comcast Cable Communications, LLC 4.54ms from Portland, US
52.90.198.176 AS14618 Amazon.com, Inc. 0.44ms from Reston, US
32.195.54.80 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
201.107.6.32 AS19373 Triara.com S.A. de C.V. 2.11ms from Santiago de Queretaro, MX
152.99.75.240 AS17841 NATIONAL INFORMATION RESOURCES SERVICE 2.68ms from Seoul, KR
183.115.106.32 AS4766 Korea Telecom 3.16ms from Seoul, KR
150.60.116.80 AS9597 KDDI Web Communications Inc. 0.75ms from Tokyo, JP
190.202.175.224 AS8048 CANTV Servicios, Venezuela 10.19ms from Willemstad, CW
84.8.15.64 AS54253 Oracle Corporation 1.79ms from Abu Dhabi, AE
75.208.84.144 AS6167 Verizon Business 15.55ms from Atlanta, US
18.118.200.0 AS16509 Amazon.com, Inc. 0.18ms from Columbus, US
220.185.166.160 AS136190 JINHUA, ZHEJIANG Province, P.R.China. 9.16ms from Ningbo, CN
72.185.197.192 AS33363 Charter Communications, Inc 8.33ms from Orlando, US
191.108.71.16 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 19.17ms from Panama, PA
121.155.12.48 AS4766 Korea Telecom 2.45ms from Seoul, KR
221.169.211.0 AS4780 Digital United Inc. 3.09ms from Taipei, TW
61.208.244.208 AS4713 NTT DOCOMO BUSINESS,Inc. 1.41ms from Tokyo, JP
89.218.176.208 AS9198 JSC Kazakhtelecom 0.17ms from Almaty, KZ
34.14.83.240 AS396982 Google LLC 0.16ms from Brussels, BE
104.185.116.16 AS7018 AT&T Enterprises, LLC 6.13ms from Chicago, US
41.136.178.16 AS23889 Mauritius Telecom Ltd 2.94ms from Ebene, MU

Traceroute

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

$
traceroute -a -n -q1 -m10 66.99.12.178
traceroute to 66.99.12.178 (66.99.12.178): 10 hops max, 52 byte packets
2 *
3 *
4 *
5 [] 208.115.136.22 4.814 ms
6 [AS6325] 206.166.9.209 5.035 ms
7 [AS6325] 206.166.9.70 5.207 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Grand Rapids, 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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