Data as of Nov 7, 2026
66.99.240.0/23
No anonymizer space · no proxy exits in 30 daysCook County · space held by Illinois Century Network
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 66.99.192.0/18 since Sep 2013 | AS6325 | Business | 1 | Illinois Century Network | |
| 66.99.128.0/17 since May 2005 | AS6325 | Business | 4 | Illinois Century Network | |
| 66.99.0.0/16 since May 2005 | AS6325 | Business | 20 | Illinois Century Network |
Network & registry
Origin network
AS46286
US
- Name
- Cook County
- Type
- Business
- Registered
- Aug 1, 2008
- Domain
- cookcountyil.gov
- Industry
- Government and Regulatory Agencies, Administrations, Departments, and Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jun 2013
- Current origin since
- Jun 2013 · 13 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 66.99.240.0/23 | AS46286 | /23 | ARIN | RPKI valid |
| 66.99.192.0/18 | AS6325 | /18 | ARIN | Another network |
| 66.99.128.0/17 | AS6325 | /17 | ARIN | Another network |
| 66.99.0.0/16 | AS6325 | /16 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS46286 | RADB | ICN Range advertised by ICn customer Cook County | MAINT-AS6325 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 66.
99. 0. 0/ 16 - Netname
- ICN7
- Registrant
- Illinois Century Network
- Organization
- Illinois Century Network (ILTN)
- Org address
- 120 W Jefferson, Springfield, IL, 62702
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-66-99-0-0-1
- Parent
- NET-66-0-0-0-0
- Created
- Apr 9, 2001
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 9, 2001
- Status
- assigned
Report abuse
Abuse contact
- doit.
security@ illinois. gov - Name
- ICN Abuse
- Phone
- +1-217-524-3648
- Handle
- ICNAB-ARIN