ASN Lookup Tool

CASTRO TELECOM LLC tecnico.ulisboa.pt US US 2 Routes

AS Data

AS19577

AS19577 – CASTRO TELECOM LLC

AS Number 19577
AS Name CASTRO-TELECOM
Organization CASTRO TELECOM LLC(ctl-383)
Country US
Website tecnico.ulisboa.pt
Number of IPv4 Routes 1
Number of IPv6 Routes 1
ASN type ISP
Registry ARIN
Date Allocated 2024-06-14

ASN Intelligence API for production workflows

Use ASN data for AS19577 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route # IPs
2602:faa5::/32 ~79×10²⁷
208.85.8.0/22 1024

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       19577
ASName:         CASTRO-TELECOM
ASHandle:       AS19577
RegDate:        2024-06-14
Updated:        2025-02-26    
Ref:            https://rdap.arin.net/registry/autnum/19577


OrgName:        CASTRO TELECOM LLC
OrgId:          CTL-383
Address:        530-B HARKLE ROAD STE 100
City:           Santa Fe
StateProv:      NM
PostalCode:     87505
Country:        US
RegDate:        2022-12-28
Updated:        2025-08-26
Ref:            https://rdap.arin.net/registry/entity/CTL-383


OrgTechHandle: TOVLC-ARIN
OrgTechName:   Castro, Tomas Oliveira Valente Leite de
OrgTechPhone:  +1-202-555-0109 
OrgTechEmail:  tomas.leite.castro@tecnico.ulisboa.pt
OrgTechRef:    https://rdap.arin.net/registry/entity/TOVLC-ARIN

OrgAbuseHandle: TOVLC-ARIN
OrgAbuseName:   Castro, Tomas Oliveira Valente Leite de
OrgAbusePhone:  +1-202-555-0109 
OrgAbuseEmail:  tomas.leite.castro@tecnico.ulisboa.pt
OrgAbuseRef:    https://rdap.arin.net/registry/entity/TOVLC-ARIN

OrgNOCHandle: TOVLC-ARIN
OrgNOCName:   Castro, Tomas Oliveira Valente Leite de
OrgNOCPhone:  +1-202-555-0109 
OrgNOCEmail:  tomas.leite.castro@tecnico.ulisboa.pt
OrgNOCRef:    https://rdap.arin.net/registry/entity/TOVLC-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS200454 Tomas Oliveira Valente Leite de Castro PT

Upstreams

AS Number Description Country
AS200454 Tomas Oliveira Valente Leite de Castro PT

Ready to get started?Get Started with IP Intelligence API Today

Get Started
CTA Illustration

Frequently Asked Questions

ASN AS19577 is an Autonomous System Number used to identify a network for BGP internet routing.
AS19577 is listed under CASTRO TELECOM LLC.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.