# TelcoAIO

> 26+ browser-native utilities for network and telecom engineering work — subnetting, DNS, ASN/BGP analysis, RPKI/IRR checks, route-policy generation, config review, and maintenance comms. Bilingual (English / Simplified Chinese). No signup, no backend state; all computation runs in the browser.

This site is a *toolbox*, not a knowledge base. Each linked page is a single-purpose utility. For programmatic consumers, a machine-readable index is available at [/tools.json](https://telcoaio.com/tools.json); a longer plain-text form for LLMs is at [/llms-full.txt](https://telcoaio.com/llms-full.txt).

## Primary tools
- [IP Subnet Calculator](https://telcoaio.com/ipSubnetCalculator.html): Compute IPv4 / IPv6 subnet details — network, broadcast, host range, and more.
- [IP Format Converter](https://telcoaio.com/ipFormatConverter.html): Convert IP addresses between decimal, hex, binary, and integer forms.
- [IP Aggregation](https://telcoaio.com/IPAggregation.html): Aggregate IPv4 / IPv6 prefixes into the smallest covering supernets.
- [VLSM Calculator](https://telcoaio.com/vlsmCalculator.html): Plan variable-length subnet masks from a parent block and host counts.
- [Wildcard Calculator](https://telcoaio.com/wildcardCalc.html): Compute wildcard masks for ACLs and route policies.
- [IPv6 Convert](https://telcoaio.com/ipv6Convert.html): Compress and expand IPv6 addresses between canonical forms.
- [CIDR ↔ IP List](https://telcoaio.com/cidrExpand.html): Convert between CIDR notation and explicit IP address lists.
- [MAC Lookup](https://telcoaio.com/macLookup.html): Identify MAC address vendors via local OUI snapshots.
- [DNS Lookup](https://telcoaio.com/dnsLookUp.html): Query DNS records via Google Public DNS and Cloudflare DoH in one call.
- [Batch PTR Lookup](https://telcoaio.com/batchPtr.html): Bulk reverse-DNS resolution for IP ranges and lists.
- [IP Information Lookup](https://telcoaio.com/IPInformation.html): One-stop prefix intel: BGP visibility, RPKI, IRR, WHOIS, geo, routing history.
- [Looking Glass Directory](https://telcoaio.com/majorLookingGlass.html): Curated directory of major operator looking glasses.
- [Port Lookup](https://telcoaio.com/portLookup.html): Look up IANA port-to-service mappings and common usage.
- [ASN Converter & Ownership Lookup](https://telcoaio.com/ASNConvertor.html): Convert ASPlain / ASDot notation and identify ASN ownership.
- [ASN Details](https://telcoaio.com/ASNinformation.html): Inspect BGP neighbours, announced prefixes, and activity for an ASN.
- [BGP Visualizer](https://telcoaio.com/bgpVisualizer.html): Visualize AS-path relationships and BGP routing context.
- [BGP Community Parser](https://telcoaio.com/bgpCommunity.html): Parse standard, extended, and large BGP communities against known registries.
- [AS-SET Expander](https://telcoaio.com/asSetExpand.html): Recursively expand AS-SET macros from IRR data sources.
- [Route Filter Generator](https://telcoaio.com/routeFilter.html): Generate prefix-list / route-filter snippets for common network OSes.
- [Config Diff](https://telcoaio.com/configDiff.html): Compare two device configurations side by side.
- [Config Highlighter](https://telcoaio.com/configHighlight.html): Vendor-aware syntax highlighting for common network configs.
- [Maintenance Generator](https://telcoaio.com/notificationGenerator.html): Draft bilingual maintenance notices and export ICS calendar invites.
- [Bandwidth Calculator](https://telcoaio.com/bandwidthCalc.html): Convert between bandwidth units and estimate transfer times.
- [MTU Calculator](https://telcoaio.com/mtuCalc.html): Calculate effective MTU / MSS across overlays and tunnels.
- [SLA Calculator](https://telcoaio.com/slaCalc.html): Translate nines-of-availability into allowed downtime.
- [Useful Links](https://telcoaio.com/UsefulLinks.html): Curated external references for day-to-day network work.


## Indexes
- [Machine-readable tool index (tools.json)](https://telcoaio.com/tools.json): JSON with EN + ZH records per tool, including inputs, outputs, use cases, data sources, and limitations.
- [Sitemap](https://telcoaio.com/sitemap.xml): every page on the site, with `hreflang` mappings.
- [Full LLM reference (llms-full.txt)](https://telcoaio.com/llms-full.txt): same content as the per-tool pages, flattened to text.

## Chinese mirror
Every English page has a `_cn.html` counterpart. Example: [/ASNConvertor.html](https://telcoaio.com/ASNConvertor.html) ↔ [/ASNConvertor_cn.html](https://telcoaio.com/ASNConvertor_cn.html).

## Data sources
External lookups (BGP, RPKI, ASN ownership, DNS) hit public APIs: RIPEstat, RIPE Database REST, Google Public DNS, Cloudflare DNS. Offline calculators (subnet, VLSM, MTU, SLA, bandwidth) run entirely in the browser.

## License & contact
Created by Ray ([ray-zhang.xyz](https://ray-zhang.xyz/)). Free to use.