66.99.10.76
IPv4 address
66.99.10.76
An address in Springfield, Illinois, United States, used by Illinois Century Network, announced by Concordia University Chicago (AS19941). It's a web server on ports 80 and 443.
Summary
Geolocation
Where the address is, and what that place uses.
- City
- Springfield
- Region
- Illinois
- Postal code
- 62701
- Country
- United States
- Continent
- North America
- Coordinates
- 39.8017, -89.6437
- Timezone
- America/Chicago
Ownership
Who holds the address: the AS announcing it, the registry record, the abuse contact and its name in DNS.
- Company
- Illinois Century Network
- Domain
- illinois.gov
- Type
- Government
- Registered in
- United States
- AS number
- AS19941
- Name
- Concordia University Chicago
- Prefix
- 66.99.8.0/22
- RPKI
- Valid
- Type
- Education
- Domain
- cuchicago.edu
- Registered in
- United States
- Name
- NETBLK-ICN-66-99-8-0-22-0029995
- Network name
- NETBLK-ICN-66-99-8-0-22-0029995
- Registry
- RWhois
- Domain
- cuchicago.edu
- Name
- ICN Abuse
- Phone
- +1-217-524-3648
- Address
- 120 W Jefferson, Suite B, Springfield, IL, 62702
- Network
- 66.99.0.0-66.99.255.255
Anonymity
Whether the address hides someone else: a VPN, Tor, a relay, a proxy pool, or a hosting range.
Network
What kind of network it is on: a mobile carrier, a satellite operator, an anycast service, a CDN edge.
Services
What our own internet-wide measurement found listening on it.
- 80 status
- 301
- 80 redirect
- https://66.99.10.76/
- 80 seen
- 2026-07-28 to 2026-10-17
- 443 status
- 302
- 443 redirect
- https://login.microsoftonline.com/3b1147b3-1d23-4cc5-8610-7adf873e06c4/oauth2/v2.0/authorize?client_id=1b514418-bcea-457e-8df9-9e34213457f0&redirect_uri=https%3A%2F%2F66.99.10.76%2Fsignin-oidc&response_type=id_token&scope=openid%20profile&response_mode=form_post&nonce=639281286773463885.MzA0MmM4ZjAtZDRkYi00NmM0LTg0NDUtZjVhYzQzMzJiZDdiOGEyZTcyODgtMGZiMi00ZDNlLTgzNzgtM2I2ZGQ0YjM2YjU0&client_info=1&x-client-brkrver=IDWeb.2.16.0.0&state=CfDJ8PRf_coKtXlKnszItd28Ezf0gIVA-ltTL5Qoe2JZ88GihQ6qMfnLtZQndbU6dys406kBoEd
- 443 server
- Microsoft-IIS/10.0
- 443 TLS
- TLSv1.3
- 443 certificate
- dataservices.cuchicago.edu
- 443 issuer
- C=US, O=Let's Encrypt, CN=YR2
- 443 browser-trusted
- Yes
- 443 seen
- 2026-07-27 to 2026-10-19
00 · Evaluate
Test the real build first.
An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.
01 · License
Then license what you use.
Standard, for detection and decisions inside your own product and operations.
Redistribution, when the data ships onward inside what you sell, priced by scope rather than by seat.
Annual terms, a named contact, and monthly, quarterly or yearly payment.