Data as of Nov 7, 2026
198.100.16.0/24
No anonymizer space · no proxy exits in 30 daysCogent Communications, LLC · space held by Canon Medical Systems USA, Inc.
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 198. | 1,536 | NETBLK-CMSU | Canon Medical Systems USA, Inc. (TAMS) · US | Direct Allocation | Mar 19, 1993 | coreadmins@ |
| └ 198.100.16.0/24 | 256 | CMSU-ISP1 | Canon Medical Systems (C00001845) · US | Reassigned | Mar 19, 1993 | coreadmins@ via NETBLK-CMSU |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Registry
Holder
- Organization
- Canon Medical Systems USA, Inc.
- Handle
- TAMS
- Range
- 198.
100. 16. 0 - 198. 100. 21. 255 - Registration type
- Direct Allocation
- Record created
- Mar 19, 1993
- Legacy
- yes
Origin network
AS174
US
- Name
- Cogent Communications, LLC
- Type
- Internet provider
- Registered
- May 16, 1996
- Domain
- cogentco.com
- Website
- www.cogentco.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 1,658
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- Nov 2008
- Current origin since
- Feb 2026 · 9 mo
- Origin networks
- 3
- Last change of origin
- Feb 2026
Recorded history
History
- Handoffs
- 2
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS22773 not the origin | RADB | RSMT | MAINT-AS22773 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 198.
100. 16. 0/ 24 - Netname
- CMSU-ISP1
- Registrant
- Canon Medical Systems
- Organization
- Canon Medical Systems (C00001845)
- Type
- Reassigned
- Handle
- NET-198-100-16-0-2
- Parent
- NET-198-100-16-0-1
- Created
- Mar 19, 1993
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 19, 1993
- Status
- assigned
Report abuse
Abuse contact
- coreadmins@
us. medical. canon - Name
- group, Core -
- Phone
- +1-714-552-1630
- Handle
- COREG3-ARIN