Data as of Nov 14, 2026
37.17.52.0/24
No anonymizer space · no proxy exits in 30 daysUnitary enterprise A1
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 37.17.0.0/17 since Dec 2011 | AS42772 | Mobile | 1,851 10 always on | Unitary enterprise A1 |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 37.17.0.0/17 | 32,768 | BY-MDC-20111219 | Unitary enterprise A1 (ORG-JMDC1-RIPE) · BY | ALLOCATED PA | Dec 19, 2011 | abuse@ |
| └ 37.17.0.0/18 | 16,384 | A1-BELARUS | Unitary enterprise A1 (ORG-JMDC1-RIPE) · BY | ASSIGNED PA | Mar 28, 2012 | abuse@ |
Network & registry
Announced by
Covering announcement 37.17.48.0/20
- Prefix
- 37.17.48.0/20
- Announced by
- AS42772 Unitary enterprise A1
- Type
- Mobile
- Proxy exits
- 14
- Always-on exits
- 2
- RPKI
- RPKI valid
- Netname
- A1-BELARUS
- Registrant
- Unitary enterprise A1
- RIR
- RIPE NCC
IPv4 market
Holder
- Organization
- Unitary enterprise A1
- Handle
- ORG-JMDC1-RIPE
- Range
- 37.
17. 0. 0/ 17 - Registration type
- ALLOCATED PA
- Record created
- Dec 19, 2011
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
37.17.48.0/20
Routing history
- Pattern
- Stable
- First seen
- May 2017
- Current origin since
- May 2017 · 9.5 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 37.17.48.0/20 | AS42772 | /20 | RIPE | RPKI valid |
| 37.17.0.0/17 | AS42772 | /17 | RIPE | Too specific |
IRR
Route objects on 37.17.48.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS42772 | RIPE | MNT-MDC | Nov 16, 2017 |
Whois
Registration for this announcement
- Range
- 37.
17. 0. 0/ 18 - Netname
- A1-BELARUS
- Registrant
- Unitary enterprise A1
- Registrant country
- BY
- Organization
- Unitary enterprise A1 (ORG-JMDC1-RIPE)
- Org country
- BY
- Type
- ASSIGNED PA
- Created
- Mar 28, 2012
- Updated
- Feb 12, 2026
- Maintainer
- MNT-MDC
- RIR
- RIPE NCC
- Country
- BY
- Delegated
- Dec 19, 2011
- Status
- assigned
Report abuse
Abuse contact
- abuse@
a1. by - Name
- Velcom RIPE Admins
- Handle
- VELC-RIPE