Accuracy & Uncertainty Brief · Reviewed 1 November 2026
How Accurate Is IP Geolocation? What an IP Can Really Reveal
Why IP geolocation is reliable at the country and network-operator level, variable at the state or city level, and incapable of pinpointing a physical street address or household.
| Granularity Level | Typical Reliability | Primary Signal Source | Main Cause of Error in India |
|---|---|---|---|
| Autonomous System / ISP | Very High | BGP routing tables & RIR RDAP allocations | Downstream LCO leasing transit from a parent ISP |
| Country Code (e.g. IN) | High | APNIC / IRINN country delegation & RFC 8805 geofeed | Global Anycast CDNs or active VPN/proxy tunnels |
| State / Telecom Circle | Moderate | Regional ISP gateway pools & IXP routing hints | Multi-state CGNAT pools routed via Mumbai, Delhi, or Chennai |
| City / Postal Code | Low to Moderate | Commercial database inference & ISP geofeeds | Dynamic IP reassignment and mobile packet gateways |
| Exact Street / Home | Impossible from IP Alone | Not present in public IP databases | Coordinates in IP APIs are city centroids, never house locations |
1. The "City Centroid" Fallacy
When a commercial geolocation API returns a latitude and longitude pair (such as 19.0760° N, 72.8777° E for Mumbai), those numbers are the geographic center point (centroid) of the city or postal polygon—not the coordinates of a user's building. Plotting that coordinate on a map without an uncertainty radius misleads users into thinking the database found a specific house or office.
2. Why Mobile Networks in India Show Distant Cities
Indian mobile networks are organized into 22 Telecom Circles. A 4G or 5G smartphone in Nashik, Nagpur, or Mysuru encapsulates its traffic inside the carrier core network until it exits at a regional Packet Data Network Gateway (PGW) or User Plane Function (UPF) in Mumbai or Bengaluru. Any external website or IP Lookup tool only sees the public IP of that gateway. Read Can Someone Find You by IP? for a realistic privacy threat model.
Technical Specifications & Protocol Facts
Authoritative parameters, dimensions, and IETF RFC compliance
| Parameter / Dimension | Technical Specification | Standard / Authority |
|---|---|---|
| Canonical Document Scope | IP Geolocation Accuracy — Route /ip-geolocation-accuracy | IPAddressLookup.in Technical Reference |
| Supported Address Families | IPv4 (32-bit dotted-decimal) & IPv6 (128-bit hexadecimal) | RFC 791 / RFC 8200 / RFC 5952 |
| Authoritative Registration Protocol | Registration Data Access Protocol (RDAP) via IANA Bootstrap | RFC 7480–7484 / RFC 9224 |
| Special-Purpose Range Classification | Private LAN (RFC 1918), Shared CGNAT 100.64.0.0/10 (RFC 6598), ULA (RFC 4193) | RFC 6890 IANA Registry |
Frequently Asked Questions
Concise answers verified against IANA, APNIC, and IETF protocol standards
What is the primary purpose of IP Geolocation Accuracy?
Understand why country lookup is reliable while city estimates shift across mobile gateways and CGNAT pools. Every output on IPAddressLookup.in follows IETF RFC standards and cites primary RIR/IANA sources.
Are IP and network queries on this page logged or shared with advertisers?
No. IPAddressLookup.in operates on a strict data-minimization model with stateless query execution, short-lived caching (15 minutes max for upstream RDAP/DNS), and zero persistent user lookup history.
How often is the technical documentation on IPAddressLookup.in reviewed?
All protocol calculators, RFC citations, and Indian telecom notes are verified by the 2026-11-01 editorial and engineering review cycle.
Related Network Tools & Technical Guides
Contextual utilities and reference documentation verified for this workflow
Diagnostic & Calculation Utilities
Geolocation Accuracy · Canonical: https://ipaddresslookup.in/ip-geolocation-accuracy · Reviewed: 2026-11-01
Reviewer: IPAddressLookup.in Technical Network Utility Group · Stateless Privacy · Accuracy & Data Limits