# ITU Proximity to Fibre Node API

**Canonical:** https://apis.io/apis/itu/itu-proximity-to-fibre-node-api/  
**Provider:** ITU — https://apis.io/providers/itu/  
**Base URL:** https://bbmaps.itu.int/functionproximity  
**Documentation:** https://www.itu.int/en/ITU-D/Technology/Pages/EmergingTechnologiesPages/api.aspx

ITU Proximity to Fibre Node API is one of 2 APIs that [ITU](https://apis.io/providers/itu/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Broadband, Fibre, Geospatial, Connectivity, and Open Data. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

An ITU-D Technology and Network Development API that scores a batch of coordinates against the ITU Interactive Transmission Map (Broadband Maps) fibre network data. Two routes are published on the ITU-D demonstration page — route-calcdistancetonode returns the proximity band to the nearest fibre node, and route-calc10kmintersection returns a within-10km flag. Both accept a POSTed text/csv body with X and Y columns and return a URL to a generated ZIP of results; both were confirmed returning HTTP 200 with real output on 2026-07-25. Access is by an Azure Functions function key passed as a ?code= query parameter that ITU embeds in the public web client, so it is effectively open; there is no signup, no OpenAPI, and no rate limit published.

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/itu/refs/heads/main/openapi/itu-proximity-openapi.yml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/itu/refs/heads/main/overlays/itu-proximity-overlay.yaml
- **Documentation** — https://www.itu.int/en/ITU-D/Technology/Pages/EmergingTechnologiesPages/api.aspx
- **APIReference** — https://www.itu.int/en/ITU-D/Technology/Pages/EmergingTechnologiesPages/api.aspx
- **Documentation** — https://www.itu.int/en/ITU-D/Technology/Pages/InteractiveTransmissionMaps.aspx

## Other ITU APIs (1)

- [ITU DataHub API](https://apis.io/apis/itu/itu-datahub-api/)

## Tags

Broadband, Fibre, Geospatial, Connectivity, Open Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/itu/itu-proximity-to-fibre-node-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/itu/.