Data as of Nov 13, 2026
185.37.5.0/28
No anonymizer space · no proxy exits in 30 daysA2B IP B.V. · space held by Advanced Team Systems Center B.V.
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 |
|---|---|---|---|---|---|---|
| 185.37.4.0/22 | 1,024 | NL-ATSC-20131007 | Advanced Team Systems Center B.V. (ORG-ATSC2-RIPE) · NL | ALLOCATED PA | Oct 7, 2013 | abuse@ |
| └ 185.37.5.0/28 | 16 | Concorp-Hosting | Concorp hosting - nl.atsc | ASSIGNED PA | Nov 7, 2013 | abuse@ via NL-ATSC-20131007 |
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
Announced by
Covering announcement 185.37.4.0/23
- Prefix
- 185.37.4.0/23
- Announced by
- AS51088 A2B IP B.V.
- Type
- Unknown
- RPKI
- RPKI valid
- Netname
- NL-ATSC-20131007
- Registrant
- Advanced Team Systems Center B.V.
- RIR
- RIPE NCC
Origin network
AS51088
NL
- Name
- A2B IP B.V.
- Type
- Internet provider
- Registered
- May 28, 2010
- Domain
- a2b-internet.com
- Website
- www.a2b-internet.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 185.37.4.0/23
185.37.4.0/23
Routing history
- Pattern
- Stable
- First seen
- Feb 2014
- Current origin since
- Feb 2014 · 13 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 185.37.4.0/23 | AS51088 | /23 | RIPE | RPKI valid |
IRR
Route objects on 185.37.4.0/23
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS51088 | RIPE | ATSC B.V. | A2B-INTERNET-MNT | Feb 10, 2014 |
Whois
Registration for this announcement
- Range
- 185.
37. 4. 0/ 22 - Netname
- NL-ATSC-20131007
- Registrant
- Advanced Team Systems Center B.V.
- Registrant country
- NL
- Organization
- Advanced Team Systems Center B.V. (ORG-ATSC2-RIPE)
- Org country
- NL
- Type
- ALLOCATED PA
- Created
- Oct 7, 2013
- Updated
- May 9, 2017
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- NL
- Delegated
- Oct 7, 2013
- Status
- assigned
Report abuse
Abuse contact
- abuse@
a2b-internet. com - Name
- ATSC B.V. Role-Object
- Handle
- ABR35-RIPE