About LookMyIP
LookMyIP is an independent site that publishes free network diagnostic tools and reference material explaining how the underlying protocols work. It covers the everyday questions that come up when something on a network is not behaving: where an IP address geolocates, why a domain resolves to the wrong server, why mail is being rejected, and whether a certificate is about to expire.
The site exists because the same handful of checks kept requiring five different websites, most of which paywalled the ASN field, capped free lookups at ten a day, or demanded an email address before returning a result. Every field LookMyIP retrieves is shown immediately, on the same page, with no account and no API key.
Who builds it
LookMyIP is built and maintained by Ajay Gupta, a software developer working on web infrastructure. It launched in March 2026 as a personal IP lookup page and grew into the current set of tools as each new diagnostic question came up in practice.
It is a small independent project, not a company. There is no funding round and no sales department. That means responses to email take a few days, but it also means nothing on the site exists because a stakeholder asked for it.
The same person also builds DevToolsForYou, SignalPe and OTTweek — see our projects.
Contributors
Each guide is credited to the contributor who wrote it and is responsible for keeping it accurate.
Ajay Gupta
Founder
Software developer working on web infrastructure. Built LookMyIP and maintains the tools.
- Who Owns a Domain? Reading WHOIS and RDAP Records After GDPR
- IP Reputation: What It Is and Why It Matters
- How to Get Your IP Off a Blacklist: Find the Cause, Then Delist
- Is Your VPN Leaking? WebRTC Leaks, DNS Leaks and What Websites Still See
- AI Crawlers and Scrapers: How to Identify, Verify and Control Them
Yash Gupta
Contributor — DNS
Writes and maintains LookMyIP's DNS guides — record types, propagation, DNSSEC and reverse DNS — and analysis of major cloud outages. Has chosen to keep their professional background private.
- How Long Does DNS Propagation Take? TTLs, Caching and a Safe Cutover
- DNS Record Types Explained: A, AAAA, CNAME, MX, TXT & More
- DNSSEC Explained: How to Tell If a Domain Is Signed and Why Validation Fails
- Reverse DNS and PTR Records: How They Work and Why Mail Servers Check Them
- The Biggest Cloud Outages of 2025–2026, and What Their Post-Mortems Have in Common
Viksit Raj
Contributor — Email
Writes and maintains LookMyIP's email guides: MX routing, SPF, DKIM and DMARC, and deliverability. Has chosen to keep their professional background private.
Avinash Mehra
Contributor — TLS & web security
Writes and maintains LookMyIP's guides on TLS certificates, Certificate Transparency, HTTP security headers, post-quantum TLS and AI in cybersecurity. Has chosen to keep their professional background private.
- SSL/TLS Certificates: What They Are and Why Your Site Needs One
- What Is Certificate Transparency and Why It Matters
- HTTP Security Headers: What Each One Does and Safe Values to Start With
- TLS Certificates Are Shrinking to 47 Days: The Timeline and What to Automate Now
- Post-Quantum TLS in 2026: Most Browser Traffic Is Already Protected. Is Your Site?
- AI in Cybersecurity in 2026: What Has Actually Changed for Attackers and Defenders
Ravi Vij
Contributor — Networking
Writes and maintains LookMyIP's networking guides: ports, port checking, redirects, speed testing and outage diagnosis. Has chosen to keep their professional background private.
- What Are Ports? Common Port Numbers Every Admin Should Know
- How to Check Open Ports with nmap, nc and netstat
- How to Check 301 Redirects and Fix Redirect Chains
- Why Speed Test Results Vary: Latency, Jitter, Download and Upload Explained
- Is It Down or Is It Just Me? How to Diagnose an Outage in Five Minutes
The tools
Seventeen tools, grouped by the kind of problem they solve.
IP intelligence
Everything that starts from an IP address — where it geolocates, who announces it, and whether anyone has flagged it.
IP Address Lookup
Location, ISP, ASN, timezone and reverse DNS for any IPv4, IPv6 or domain. Auto-detects your own public IP on load.
IP Reputation
Abuse confidence score, recent reports, Tor exit status and usage type (for example datacenter/hosting) for any address.
IP Blacklist Check
Queries 10 DNSBLs including Barracuda, SpamCop, UCEPROTECT and DroneBL in parallel.
IP Privacy & Leak Test
Detects WebRTC leaks and proxy header leaks that expose your real IP behind a VPN.
DNS
The resolution layer. These four cover the questions that come up when a domain does not resolve the way you expect.
DNS Lookup
Query A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records with their TTLs.
DNS Propagation Checker
Compares answers from resolvers worldwide so you can see how far a change has spread.
DNSSEC Checker
Validates the DS and DNSKEY chain of trust and reports where it breaks.
Reverse DNS Lookup
PTR lookup with forward-confirmation (FCrDNS), the check mail servers actually run.
Email deliverability
Why mail lands in spam is almost always answerable from these two pages plus the blacklist checker.
Web and transport
What a browser sees before it renders anything — the certificate, the headers, and every redirect in between.
SSL Certificate Checker
Issuer, validity window, expiry countdown and full chain verification.
HTTP Header Checker
Response headers with a security review of HSTS, CSP, X-Frame-Options and friends.
Redirect Chain Checker
Every 301/302/307/308 hop, with HTTPS downgrades and loops called out.
Open Port Checker
Tests whether a TCP port accepts connections from the public internet.
Internet Speed Test
Download, upload, latency and jitter measured from the browser.
Records and reference
Registration data, and the written material that explains the rest.
WHOIS Lookup
Registrar, creation and expiry dates, nameservers and registrant data where not GDPR-redacted.
Knowledge Base
Short, direct answers to the questions the tools raise most often.
Guides
In-depth guides to DNS propagation and records, WHOIS, ports, IP blacklists and reputation, TLS certificates and email authentication.
Where the data comes from
LookMyIP does not maintain its own geolocation database. Results are retrieved live from the providers below, or queried directly from the authoritative source over DNS, RDAP or TLS. Nothing is cached beyond what the record's own TTL permits.
The full source-and-refresh table, including how often each dataset updates, is on the methodology page.
What the results can and cannot tell you
Being straight about accuracy matters more than looking impressive, so: IP geolocation identifies a network, not a person or a building. Country-level accuracy runs around 99%. City-level is roughly 80–90% and is typically correct to within 25–50 miles. Street-level precision is not achievable from an IP address alone, and any site claiming otherwise is showing you the centroid of a region.
Mobile connections are the least reliable case — carrier IPs often register to a regional gateway hundreds of miles from the handset. Corporate VPNs and satellite links behave the same way.
DNS results reflect what a specific resolver returned at a specific moment. Because of caching, GeoDNS and anycast, a different resolver may legitimately return a different answer for the same name at the same time. This is why the propagation checker queries many resolvers rather than one.
If a result looks wrong, it is worth reporting — geolocation databases do carry stale records, and the providers act on corrections. Send details to hello@lookmyip.com.
Editorial standards
Guides on this site are written to be checked. Where a claim involves a specific number — an SPF lookup limit, a default TTL, a port number, a key length — it comes from the relevant RFC or the vendor's own documentation, and the guide says which.
Some contributors prefer to keep their professional backgrounds private. Their guides are held to the same standard: claims are sourced, commands and outputs are real, and each guide links to a tool you can use to check it yourself.
Every article carries a published date, and a last-updated date when it has been revised. Dates are never refreshed to fake recency; if the date has not moved, the content has not changed.
No article on this site is a paid placement. Nobody has paid to be mentioned, recommended, or ranked, and no tool comparison is sponsored.
Corrections are made in place rather than quietly deleted, and material corrections are noted in the article. Read the full policy on the methodology page.
How the site is funded
LookMyIP costs money to run — geolocation and reputation API credits, bandwidth for the speed test, and server time for every lookup. The site is funded by advertising and by occasional reader donations. It is not funded by selling data, because there is no data to sell: lookups are not retained.
Ads are kept out of the result panels themselves, and the IPs and domains you enter are never shared with advertising partners. The privacy policy sets out exactly which cookies are involved and how to opt out of personalised ads.
Every tool stays free regardless. There is no premium tier planned, and no field is held back for one.
Privacy in one paragraph
LookMyIP does not store the IP addresses or domains you look up. Queries are processed in real time and discarded once the response is sent. Rate limiting (10 lookups per minute per IP) is enforced in memory only and is never written to a database. Analytics are aggregate and pseudonymous. The full detail is in the privacy policy.
Get in touch
Bug reports, wrong geolocation results, feature requests and security disclosures are all welcome at hello@lookmyip.com, or through the contact page. Replies usually take a few days.