Data as of Nov 14, 2026
199.16.241.0/24
No anonymizer space · no proxy exits in 30 daysDiogo Castro · space held by Alpha1Servers, LLC
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Risk
30 / 100 · Medium
Recently moved
Recent change
New origin Aug 2026
from AS200454 Tomas Oliveira Valente Leite de Castro
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 |
|---|---|---|---|---|---|---|
| 199.16.240.0/22 | 1,024 | ALPHA1-NET-01 | Alpha1Servers, LLC (AL-2479) · US | Direct Allocation | Dec 30, 2019 | abuse@ |
| └ 199. | 768 | NET-ALPHA | Castro Telecom LLC (CTL-383) · US | Reallocated | May 7, 2024 | tomas. |
Network & registry
Registry
Holder
- Organization
- Alpha1Servers, LLC
- Handle
- AL-2479
- Range
- 199.
16. 240. 0/ 22 - Registration type
- Direct Allocation
- Record created
- Dec 30, 2019
- Reallocated to
- Castro Telecom LLC (CTL-383)
- Reallocated range
- 199.
16. 241. 0 - 199. 16. 243. 255 - Reallocated
- May 7, 2024
Origin network
AS207118
PT
- Name
- Diogo Castro
- Type
- Business
- Registered
- Jan 7, 2026
- Domain
- as207118.net
- Website
- as207118.net
- Industry
- Museums, Libraries, and Entertainment
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- Dec 2019
- Current origin since
- Aug 2026 · 3 mo
- Origin networks
- 6
- Last change of origin
- Aug 2026
Recorded history
History
- Handoffs
- 6
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS50666 not the origin | ARIN | LIGAT-TELECOM | MNT-CTL-383 | Mar 5, 2026 |
| AS200454 not the origin | ALTDB | Tomas Leite de Castro | MAINT-CASTRO | Nov 22, 2023 |
| AS200454 not the origin | ARIN | Route for AS200454 | MNT-AL-2479 | Nov 30, 2023 |
| AS207118 | ARIN | something something | MNT-CTL-383 | Aug 18, 2026 |
| AS397525 not the origin | ARIN | Alpha1Servers LLC | MNT-AL-2479 | Nov 11, 2021 |
Whois
Registration for this announcement
- Range
- 199.
16. 241. 0 - 199. 16. 243. 255 - Netname
- NET-ALPHA
- Registrant
- Castro Telecom LLC
- Organization
- Castro Telecom LLC (CTL-383)
- Org address
- 530-B HARKLE ROAD STE 100, Santa Fe, NM, 87505
- Org country
- US
- Type
- Reallocated
- Handle
- NET-199-16-241-0-1
- Parent
- NET-199-16-240-0-1
- Created
- May 7, 2024
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 30, 2019
- Status
- assigned
Report abuse
Abuse contact
- tomas.
leite. castro@ tecnico. ulisboa. pt - Name
- Tomas Oliveira Valente Leite de Castro
- Phone
- +1-202-555-0109
- Handle
- TOVLC-ARIN