Data as of Nov 5, 2026
143.20.223.0/24
Anonymizer · ISP proxyRCN · space held by Net and Grid Research, LLC
Announcement
this exact prefix
RPKI valid
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Aug 2026
from AS9304 HGC Global Communications Limited
IPv4 market
Path
Announced by AS6079 since Aug 2026 · 12 wk ago
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 143.20.223.0/24 | /24s |
|---|---|---|
| IPXO | 256100% | 1 |
Leased from
Owners leasing their own space
| Name | In 143.20.223.0/24 | /24s |
|---|---|---|
| Gauss Research Laboratory | 256100% | 1 |
Lineage
How this block came to its use, oldest first. The whole IPv4 market →
143.20.223.0/24
From the registry to its use
- Apr 14, 2025Registry recordNet and Grid Research, LLCLEGACY143.20.0.0/16
- Jul 11, 2025– Jul 22, 2025
- Jul 11, 2025– Sep 8, 2025
- Sep 9, 2025– Nov 19, 2025
- Nov 8, 2025– Dec 13, 2025Announced
- Nov 8, 2025– Mar 7, 2026
- Dec 14, 2025– Dec 25, 2025
- Jan 7, 2026– Feb 11, 2026
- Aug 11, 2026– today
- Aug 20, 2026Route objectIPXORIPE route object for AS6079 RCN, maintainer NETUTILS-MNT
- Aug 20, 2026Route objectIPXORADB route object for AS6079 RCN, maintainer MAINT-AS834
- todayLeased fromIPXOIP broker
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 |
|---|---|---|---|---|---|---|
| 143.20.0.0/16 | 65,536 | us-netandgrid-19900805 | Net and Grid Research, LLC (ORG-NAGR1-RIPE) · US | LEGACY | Apr 14, 2025 | cthomas57@ |
| └ 143.20.128.0/17 | 32,768 | NET-143-20-128-0-17 | Internet Utilities Europe and Asia Limited (ORG-IL687-RIPE) · GB | LEGACY | Apr 17, 2025 | report@ |
| └ 143.20.223.0/24 | 256 | NET-143-20-223-0-24 | unknown | LEGACY | Jul 13, 2025 | report@ |
Network & registry
IPv4 market
Holder
- Organization
- Net and Grid Research, LLC
- Handle
- ORG-NAGR1-RIPE
- Range
- 143.
20. 0. 0/ 16 - Registration type
- LEGACY
- Record created
- Apr 14, 2025
- Legacy
- yes
Origin network
AS6079
US
- Name
- RCN
- Type
- Internet provider
- Registered
- Apr 4, 2001
- Domain
- astound.com
- Website
- www.astound.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- Jul 2025
- Current origin since
- Aug 2026 · 3 mo
- Origin networks
- 7
- Last change of origin
- Aug 2026
Recorded history
History
- Handoffs
- 7
Whois
Registration for this announcement
- Range
- 143.
20. 223. 0/ 24 - Netname
- NET-143-20-223-0-24
- Registrant country
- EU
- Organization
- Not stated by the registry
- Type
- LEGACY
- Created
- Jul 13, 2025
- Updated
- Aug 20, 2026
- Maintainer
- netutils-mnt
- RIR
- RIPE NCC
- Country
- US
- Delegated
- Aug 5, 1990
- Status
- assigned
Report abuse
Abuse contact
- report@
abuseradar. com - Name
- Private Customer
- Handle
- PC21009-RIPE