Data as of Nov 9, 2026
198.251.18.0/23
No anonymizer space · no proxy exits in 30 daysNorthShore University HealthSystem · space held by Northwest Community Hospital
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 198.251.18.0/24 since Dec 2025 | AS36319 | Business | Northwest Community Hospital | |
| 198.251.19.0/24 since Dec 2025 | AS36319 | Business | Northwest Community Hospital |
Network & registry
Origin network
AS36319
US
- Name
- NorthShore University HealthSystem
- Type
- Education
- Registered
- Nov 28, 2005
- Domain
- northshore.org
- Industry
- Education and Research
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Dec 2025
- Current origin since
- Dec 2025 · 11 mo
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 198.
251. 16. 0 - 198. 251. 30. 255 - Netname
- NETBLK-NWCHDATCOM
- Registrant
- Northwest Community Hospital
- Organization
- Northwest Community Hospital (NCH-1)
- Org address
- 800 West Central Road, Arlington Heights, IL, 60005
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-198-251-16-0-1
- Parent
- NET-198-0-0-0-0
- Created
- Aug 30, 1993
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 30, 1993
- Status
- assigned
Report abuse
Abuse contact
- meilken@
nch. org - Name
- Eilken, Mark A
- Phone
- +1-847-618-4834
- Handle
- MARKA51-ARIN