Data as of Nov 5, 2026
199.237.56.0/21
Anonymizer · ISP proxyRCN · space held by NTT America, Inc.
IPv4 market
Path
4 · Use
ISP proxy
anonymizer space, operator not named
Operators, sellers and brokers
Leased from
IP brokers
| Name | In 199.237.56.0/21 | /24s |
|---|---|---|
| Rackdog | 2,048100% | 8 |
Leased from
Owners leasing their own space
| Name | In 199.237.56.0/21 | /24s |
|---|---|---|
| NTT America, Inc. | 2,048100% | 8 |
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Anonymizer addresses | Operator | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|---|---|
| 199.236.0.0/14 since Oct 2016 | AS2914 | Internet provider | 5,6322.1%ISP proxy | Proxy providerssold by Novada | IP broker ARISK (part) | 12 | NTT America, Inc. |
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 |
|---|---|---|---|---|---|---|
| 199.236.0.0/14 | 262,144 | NTTA-199-236 | NTT America, Inc. (NTTAM-1) · US | Direct Allocation | Apr 18, 1994 | abuse@ |
| └ 199.237.0.0/18 | 16,384 | RCN-199-237 | RCN (C11598223) · US | Reassigned | May 19, 2026 | abuse@ via NTTA-199-236 |
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 199.237.48.0/20
- Prefix
- 199.237.48.0/20
- Announced by
- AS6079 RCN
- Type
- ISP proxy
- Anonymizer addresses
- all
- Leased from
- IP broker Rackdog
- RPKI
- RPKI valid
- Netname
- RCN-199-237
- Registrant
- RCN
- RIR
- ARIN
IPv4 market
Holder
- Organization
- NTT America, Inc.
- Handle
- NTTAM-1
- Range
- 199.
236. 0. 0/ 14 - Registration type
- Direct Allocation
- Record created
- Apr 18, 1994
- 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
Covering aggregate above, the prefix's own history below
199.237.48.0/20
Routing history
- Pattern
- Stable
- First seen
- Dec 2025
- Current origin since
- Dec 2025 · 11 mo
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 199.237.0.0/18 | AS1299 | /24 | ARIN | Another network |
| 199.237.0.0/18 | AS3257 | /24 | ARIN | Another network |
| 199.237.0.0/18 | AS6079 | /24 | ARIN | RPKI valid |
| 199.237.0.0/18 | AS7029 | /24 | ARIN | Another network |
| 199.237.0.0/18 | AS7843 | /24 | ARIN | Another network |
| 199.237.0.0/18 | AS11404 | /24 | ARIN | Another network |
| 199.237.0.0/18 | AS201115 | /24 | ARIN | Another network |
| 199.237.0.0/18 | AS398465 | /24 | ARIN | Another network |
| 199.236.0.0/14 | AS2914 | /14 | ARIN | Another network |
IRR
Route objects on 199.237.48.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS6079 | RADB | MAINT-AS398465 | Dec 9, 2025 |
Whois
Registration for this announcement
- Range
- 199.
237. 0. 0/ 18 - Netname
- RCN-199-237
- Registrant
- RCN
- Organization
- RCN (C11598223)
- Type
- Reassigned
- Handle
- NET-199-237-0-0-1
- Parent
- NET-199-236-0-0-1
- Created
- May 19, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 18, 1994
- Status
- assigned
Report abuse
Abuse contact
- abuse@
ntt. net - Name
- NTT America Abuse Contact
- Phone
- +1-877-688-6625
- Handle
- NAAC-ARIN