Data as of Nov 7, 2026
143.121.0.0/16
1 residential-proxy exit · 30 daysSurf B.V. · space held by Universitair Medisch Centrum Utrecht
Residential-proxy exits
Proxy exits
1
<0.01% of its addresses · 30 days
Spread
1 of 256
/24s with at least one exit
Providers
3
selling exits here
Oct 8, 2026 – Nov 6, 2026
Exits seen per day
1 observation
Proxy providers listing exits
- AnyIP
- KocerRoxy
- LemonBright
Network & registry
Origin network
AS1103
NL
- Name
- Surf B.V.
- Type
- Education
- Registered
- Sep 1, 1993
- Domain
- surf.nl
- Website
- www.surf.nl/en
- Industry
- Computer and Information Technology
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS1103 | RIPE | netname: AZUTRECHT | AS1103-MNT | Sep 22, 2001 |
Whois
Registration for this announcement
- Range
- 143.
121. 0. 0/ 16 - Netname
- UMCU
- Registrant
- Universitair Medisch Centrum Utrecht
- Registrant country
- NL
- Organization
- Universitair Medisch Centrum Utrecht
- Org country
- NL
- Type
- LEGACY
- Created
- Not stated by the registry
- Updated
- May 28, 2019
- Maintainer
- SN-LIR-MNT
- RIR
- RIPE NCC
- Country
- NL
- Delegated
- Sep 17, 1990
- Status
- assigned