Data as of Nov 6, 2026
151.249.196.0/22
No anonymizer space · no proxy exits in 30 daysUnitary enterprise A1 · space held by ALFA TELECOM s.r.o.
Announcement
this exact prefix
RPKI valid
Announced by
Type
Mobile
Risk
10 / 100 · Low
Shared address
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 151.249.128.0/17 since May 2015 | AS44546 | Residential | 12,670 178 always on | ALFA TELECOM s.r.o. |
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 |
|---|---|---|---|---|---|---|
| 151.249.128.0/17 | 32,768 | CZ-ALFATELECOM-20120820 | ALFA TELECOM s.r.o. (ORG-ATS13-RIPE) · CZ | ALLOCATED PA | Aug 20, 2012 | abuse@ |
| └ 151.249.192.0/18 | 16,384 | A1-NET | Unitary enterprise A1 (ORG-JMDC1-RIPE) · BY | ASSIGNED PA | Jul 7, 2014 | abuse@ |
Network & registry
IPv4 market
Holder
- Organization
- ALFA TELECOM s.r.o.
- Handle
- ORG-ATS13-RIPE
- Range
- 151.
249. 128. 0/ 17 - Registration type
- ALLOCATED PA
- Record created
- Aug 20, 2012
Origin network
AS42772
BY
- Name
- Unitary enterprise A1
- Type
- Internet provider
- Registered
- Apr 13, 2007
- Domain
- a1.by
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Feb 2024
- Current origin since
- Feb 2024 · 2.7 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 151.249.128.0/17 | AS42772 | /24 | RIPE | RPKI valid |
| 151.249.128.0/17 | AS44546 | /24 | RIPE | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS42772 | RIPE | RIPE-DB-MNT | May 22, 2026 |
Whois
Registration for this announcement
- Range
- 151.
249. 192. 0/ 18 - Netname
- A1-NET
- Registrant
- Unitary enterprise A1
- Registrant country
- BY
- Organization
- Unitary enterprise A1 (ORG-JMDC1-RIPE)
- Org country
- BY
- Type
- ASSIGNED PA
- Created
- Jul 7, 2014
- Updated
- Feb 13, 2026
- Maintainer
- RIPE-DB-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Aug 20, 2012
- Status
- assigned
Report abuse
Abuse contact
- abuse@
a1. by - Name
- Velcom RIPE Admins
- Handle
- VELC-RIPE