What is an ISP Checker?
An ISP Checker is a tool that reveals detailed information about your Internet Service Provider (ISP) based on your IP address. When you connect to the internet, your ISP assigns you a unique IP address that can reveal a lot about your connection, including your approximate location, organization name, and network details.
Our free ISP lookup tool instantly fetches comprehensive data about any IP address, including the ISP name, ASN, geographic location, and other network-related information.
What Information Does This Tool Show?
- ISP Name — The name of your Internet Service Provider
- Organization — The company or organization that owns the IP range
- ASN (Autonomous System Number) — A unique number that identifies your network on the internet
- IP Address — The unique numerical label assigned to your connection
- Geographic Location — Country, region, city, and ZIP code
- Coordinates — Latitude and longitude of the IP location
- Timezone — The timezone of the IP location
- Currency & Language — Country-specific information
Why Would You Need to Check Your ISP?
- Network Troubleshooting — Verify that your connection is routing through the correct ISP
- Security Audits — Check if your IP is associated with your expected ISP
- Geo-Restriction Testing — Confirm what location your IP appears to be from
- VPN Testing — Verify if your VPN is working and changing your apparent location
- Email Deliverability — Check if your IP is properly associated for email sending
Understanding ASN (Autonomous System Number)
An Autonomous System Number (ASN) is a unique identifier that your ISP receives from regional internet registries (RIRs) like ARIN, RIPE NCC, or APNIC. It helps route internet traffic between different networks. Larger ISPs typically have multiple ASNs.
For example:
- Comcast typically has ASN 7922
- AT&T typically has ASN 7018
- Verizon typically has ASN 701
What is the Difference Between Public and Private IP?
Your public IP address is assigned by your ISP and is visible to the outside world. It's used for communication across the internet. A private IP address is assigned by your router for devices within your local network and is not directly accessible from the internet.
Privacy
We do not store or log any IP addresses or ISP information that you query. All lookups are performed in real-time using third-party geolocation services. Your privacy is our priority.
Frequently Asked Questions
Is this ISP Checker free?
Yes, our ISP Checker is 100% free with no limits, registration, or captchas required.
How accurate is ISP location?
ISP geolocation is typically accurate at the country and city level. However, it may not pinpoint your exact address. The location shown is based on where your ISP's servers are registered, which may be in a different city or state than where you're actually located.
Can I check any IP address?
Yes, you can check any public IP address. However, private IP addresses (like 192.168.x.x, 10.x.x.x, or 172.16.x.x) cannot be looked up as they are not routable on the public internet.
Why does my ISP show a different location?
Several reasons: your ISP's main servers might be in a different city, you might be using a VPN or proxy, or the IP range might be registered to a different location than where you're physically located.
What is an ASN?
An Autonomous System Number (ASN) is a unique identifier used for routing traffic on the internet. Each ISP has one or more ASNs that help identify their network infrastructure.