Data as of Nov 3, 2026
167.73.64.0/18
No anonymizer space · no proxy exits in 30 daysSpectrum Health
Operators, sellers and brokers
Corporate gateways
| Name | Parent | In 167.73.64.0/18 | /24s |
|---|---|---|---|
| Zscaler | 2561.6% | 1 |
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 167.73.0.0/16 since Aug 2025 | AS12099 | Business | 56 | Spectrum Health |
More specific
Announcements inside
| Prefix | Origin | Type | Operator | Holder | RPKI |
|---|---|---|---|---|---|
| 167.73.110.0/24 since Sep 2025 | AS22616 | Corporate gateway | Corporate gatewaysoperated by Zscaler | Spectrum Health |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
16,384 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Business | 16,128 | 98% | 2 | |
| Corporate gateway | 256 | 1.6% | 1 |
Network & registry
Origin network
AS30710
US
- Name
- Spectrum Health
- Type
- Business
- Registered
- Dec 9, 2003
- Domain
- spectrumhealth.org
- Industry
- Community Groups and Nonprofits
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2025
- Current origin since
- Aug 2025 · 1.2 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 167.73.0.0/16 | AS12099 | /24 | ARIN | Another network |
| 167.73.0.0/16 | AS30710 | /24 | ARIN | RPKI valid |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS30710 | RADB | Spectrum Health / Corewell Health | MAINT-AS26554 | Dec 5, 2025 |
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 167.73.96.0/20 | AS30710 | RADB | PNAP-CHG Ussignal Routes | MAINT-AS1828 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 167.73.0.0/16
- Netname
- SPECTRUM-HEALTH
- Registrant
- Spectrum Health
- Organization
- Spectrum Health (SPECT-19-Z)
- Org address
- 100 Michigan St NE, Grand Rapids, MI, 49503
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-167-73-0-0-1
- Parent
- NET-167-0-0-0-0
- Created
- May 11, 1993
- RIR
- ARIN
- Country
- US
- Delegated
- May 11, 1993
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- No, Contact Known
- Phone
- +1-800-555-1234
- Handle
- CKN23-ARIN