Data as of Nov 9, 2026
185.81.172.0/23
Anonymizer · Datacenter proxyWS Telecom Inc · space held by Ivan Bulavkin
IPv4 market
Path
1 · Holder
record created Mar 12, 2019 · reallocated to SIA "Singularity Telecom" Oct 19, 2022
4 · Use
Datacenter proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
Owners leasing their own space
| Name | In 185.81.172.0/23 | /24s |
|---|---|---|
| Ivan Bulavkin | 512100% | 2 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
185.81.172.0/23
From the registry to its use
- Sep 8, 2015– Dec 19, 2017
- Dec 8, 2017– Nov 8, 2018
- Oct 28, 2018– Nov 8, 2018
- Nov 9, 2018– Jun 6, 2020
- Mar 12, 2019Registry recordIvan BulavkinALLOCATED PA185.81.172.0/22
- Apr 20, 2020Route objectAS33182 HostDime.com, Inc.RADB route object for AS33182 HostDime.com, Inc., maintainer MAINT-AS11172
- Jun 7, 2020– Apr 26, 2021
- Apr 15, 2021– Apr 21, 2022
- Apr 10, 2022– Feb 3, 2023AnnouncedAS207710 WS Telecom Inc
- Oct 19, 2022ReallocatedSIA "Singularity Telecom"SUB-ALLOCATED PA185.81.172.0/23
- Feb 1, 2023Route objectAS209372 WS Telecom IncRIPE route object for AS209372 WS Telecom Inc, maintainer WS-TELECOM WS-TELEKOM MNT-LV-IPMEN1-1185.81.172.0/24
- Feb 1, 2023Route objectAS209372 WS Telecom IncRIPE route object for AS209372 WS Telecom Inc, maintainer WS-TELECOM WS-TELEKOM MNT-LV-IPMEN1-1185.81.173.0/24
- Jul 24, 2024Route objectAS33191 Notion Labs, Inc.RADB route object for AS33191 Notion Labs, Inc., maintainer MAINT-AS32098
- Aug 4, 2025– today
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 |
|---|---|---|---|---|---|---|
| 185.81.172.0/22 | 1,024 | RU-MAINACC-20141217 | Ivan Bulavkin (ORG-BIA108-RIPE) · RU | ALLOCATED PA | Mar 12, 2019 | noc@ |
| └ 185.81.172.0/23 | 512 | Net-M1 | SIA "Singularity Telecom" (ORG-ST325-RIPE) · RU | SUB-ALLOCATED PA | Oct 19, 2022 | abuse@ |
| └ 185.81.172.0/24 | 256 | Istanbul | SIA "Singularity Telecom" (ORG-ST325-RIPE) | ASSIGNED PA | Oct 19, 2022 | abuse@ |
| └ 185.81.173.0/24 | 256 | Jerusalem | SIA "Singularity Telecom" (ORG-ST325-RIPE) | ASSIGNED PA | Oct 19, 2022 | abuse@ |
Network & registry
IPv4 market
Holder
- Organization
- Ivan Bulavkin
- Handle
- ORG-BIA108-RIPE
- Range
- 185.
81. 172. 0/ 22 - Registration type
- ALLOCATED PA
- Record created
- Mar 12, 2019
- Reallocated to
- SIA "Singularity Telecom" (ORG-ST325-RIPE)
- Reallocated range
- 185.
81. 172. 0/ 23 - Reallocation type
- SUB-ALLOCATED PA
- Reallocated
- Oct 19, 2022
Origin network
AS209372
US
- Name
- WS Telecom Inc
- Type
- Hosting
- Registered
- Aug 23, 2019
- Domain
- wstelecom.us
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Sep 2015
- Current origin since
- Aug 2025 · 1.3 yr
- Origin networks
- 8
- Last change of origin
- Aug 2025
Recorded history
History
- Handoffs
- 7
IRR
Route objects on the exact prefix
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 185.81.172.0/24 | AS209372 | RIPE | WS-TELECOM WS-TELEKOM MNT-LV-IPMEN1-1 | Feb 1, 2023 | |
| 185.81.173.0/24 | AS209372 | RIPE | WS-TELECOM WS-TELEKOM MNT-LV-IPMEN1-1 | Feb 1, 2023 |
Whois
Registration for this announcement
- Range
- 185.
81. 172. 0/ 23 - Netname
- Net-M1
- Registrant
- SIA "Singularity Telecom"
- Registrant country
- RU
- Organization
- SIA "Singularity Telecom" (ORG-ST325-RIPE)
- Org country
- RU
- Type
- SUB-ALLOCATED PA
- Created
- Oct 19, 2022
- Updated
- Oct 19, 2022
- Maintainer
- MEN2018-MNT
- RIR
- RIPE NCC
- Country
- RU
- Delegated
- Dec 17, 2014
- Status
- assigned
Report abuse
Abuse contact
- abuse@
ws. network - Name
- SIA "Singularity Telecom"
- Handle
- ST13100-RIPE