TCP Connectivity Test — BGP Route & ASN Lookup
BGP and ASN routing context for IPv4 or hostname — bgp-route backend, not live TCP connect
How to Use This Tool
- Enter a public IPv4 address, domain, or ASN like AS15169 or 15169.
- Query validation accepts IP-shaped, domain-shaped, or ASN-shaped input.
- bgp-route resolves domains to IPv4 before BGPView registry lookup.
- ASN queries fetch prefix samples with prefixCount when API succeeds.
- IP queries map address to originating ASN, org, and country fields.
- Review asn, organization, prefixes, prefixCount, and note fields.
About This Tool
Operators searching TCP connectivity test often expect a port-level handshake probe, but VSPIC is transparent about actual behavior: tcp-connectivity-test calls the bgp-route action with your query — IPv4, resolvable domain, or ASN such as AS15169 — returning ASN registry metadata, organization, country, and up to twenty sample IPv4 prefixes when prefix enumeration succeeds.
There is no live TCP SYN connect, telnet probe, or socket timeout measurement on this page. Use tcp-port-scanner or shodan-quick-view for internet-facing port exposure after resolving hosting IPv4. Use ping-test where ICMP is permitted. This page exists to serve search demand while explaining limitations honestly and sharing identical JSON with bgp-route-lookup.
Common use cases
- •Measure download and upload speed
- •Test open ports on a home router or server
- •Trace routing paths to diagnose latency
Why use VSPIC for ?
- Routing ownership context before deeper TCP port investigation.
- ASN and org fields for firewall ticket enrichment.
- Sample prefix list for peering and capacity research on ASN input.
- Domain and IPv4 input with automatic resolution.
- Same reliable bgp-route path as bgp-route-lookup.
- Free instant lookup — no account required.
TCP connectivity versus BGP route lookup
True TCP connectivity testing opens a socket to host:port, measures handshake completion, TLS negotiation, and response timing. Our page performs BGP and ASN registry lookup via bgp-route — answering who originates routes for an IP, not whether port 443 accepts connections.
Run tcp-port-scanner on resolved IPv4 for Shodan-indexed or basic-scan port exposure when TCP reachability is the question.
What bgp-route returns for IP input
lookupAsn style response includes asn, name, org, country, prefix containing the IP when available, and ip echo. Use org and asn in tickets when escalations require provider identification before port scans.
Absence of prefix detail on IP-only queries is normal — full prefix tables appear primarily on ASN-shaped input.
What bgp-route returns for ASN input
ASN queries like AS15169 trigger prefix enumeration when BGPView prefixes API succeeds — returning up to twenty ipv4_prefixes samples and prefixCount total. Registry metadata includes organization and country for peering research.
When prefixes API fails, registry metadata still returns with note about route detail availability.
Relationship to bgp-route-lookup
tcp-connectivity-test and bgp-route-lookup both call action bgp-route with identical JSON. bgp-route-lookup uses routing SEO vocabulary; this page serves TCP connectivity search demand with explicit limitation disclaimers.
Prefer bgp-route-lookup for peering documentation; use this page when explaining honest behavior to stakeholders.
Follow-up with port scanning tools
After confirming ASN and org via bgp-route, resolve target IPv4 and run tcp-port-scanner or shodan-quick-view for open TCP ports, service samples, and vulnerability hints when SHODAN_API_KEY is configured.
Authorized scanning only — document rules of engagement.
Follow-up with latency tools
ping-test and packet-loss-test measure reachability and HTTP loss from our server — complementary to routing metadata. mtr-path-analyzer adds hop-level behavior when paths degrade.
BGP context explains who owns the path; probe tools measure whether packets complete.
Domain input behavior
Domains resolve to current public A record IPv4 before ASN mapping. CDN edge IPs may differ from origin — use origin-ip-finder when CDN obscures resolution.
Document which IP you looked up when multiple A records exist.
API action bgp-route
GET /ip-tools/api/extended?action=bgp-route&query=8.8.8.8 or query=AS15169. Parse asn, org, prefixes, prefixCount, note. Branch automation on ASN-shaped versus IP-shaped input.
Cache registry metadata longer than prefix lists — prefixes change more frequently.
Authorized use
Lookup public routing data for networks you analyze in support, security, or engineering workflows. BGP registry queries do not contact target hosts directly.
We do not permanently store your searches.
Important notes & limitations
- Does not perform live TCP connectivity or port handshake tests.
- Does not measure latency, loss, or jitter to target ports.
- Prefix lists reflect BGPView snapshots — not live router tables.
- IPv6-only hosts without IPv4 A records may not resolve from domain input.
- Routing metadata does not prove TCP service availability on specific ports.
Frequently Asked Questions
Yes. VSPIC offers this TCP connectivity test at no cost with no account required. Results load in real time.
We do not permanently store your queries on our servers. Some tools run entirely in your browser; others fetch public data for the request only.
Yes. Open the page in any modern phone or tablet browser. Results work on Wi‑Fi and mobile data.
No. It runs bgp-route ASN and routing lookup. Use tcp-port-scanner or shodan-quick-view for port exposure.
Yes. Both use action bgp-route with query parameter. JSON fields are identical.
Not on this page. Resolve IPv4 and use tcp-port-scanner with the ip parameter.
Confirm ASN and org ownership so scans target intended provider infrastructure.
Yes. AS15169 or 15169 returns registry metadata and sample prefixes when available.
bgp-route with the query parameter.
Next step for your check
Continue with bgp route lookup on VSPIC.
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