The NOC Operator Toolkit

Fast, no-nonsense tools for network operators: the ones I kept wishing existed. Free to use, with nothing to sign up for.

Why this exists

I spend my days in a NOC, and I kept hitting the same wall: the tools I needed were either buried behind unusably low rate limits, hidden behind a login, or had quietly swapped a free tier for a pricing page. I didn’t like the tools that existed, so I made my own.

No accounts, no limits you’ll realistically hit. Just the things I reach for during an incident, built to be fast and to stay out of the way. More will land here over time.

All tools

Thirteen tools, grouped by what you’re troubleshooting.

JSON API public endpointBrowser only use the pageRuns locally nothing leaves your browser

Routing

6 tools

IP → ASN LookupJSON APILongest-prefix match against a live BGP table, plus the owner’s WHOIS.ASN LookupJSON APIRegistrant details and every prefix an AS originates right now.BGP Looking GlassBrowser onlyCompare AS paths, next hops and communities across every peer.RPKI ValidatorJSON APIIs this AS allowed to originate this prefix? Checked against all five RIRs.ASPA ValidatorJSON APIIs this AS path valley-free? Every hop checked against published provider authorizations.IRR ValidatorJSON APIRoute objects, as-sets and maintainers across every mirrored registry.

Domains & TLS

3 tools

DNS LookupBrowser onlyTrace a name from the root down, or run a full domain health check.SMTP TLS TestBrowser onlyFind the MX hosts, negotiate STARTTLS and see the whole transaction.Website SSL TestBrowser onlyCertificate, protocol support and cipher strength, graded in plain English.

Telephony

1 tool

STIR/SHAKEN Certificate TestBrowser onlyPaste an x5u URL: the signing certificate, its SPC, the chain to the STI-PA roots, revocation and fetch time.

Utilities

3 tools

MAC Address LookupJSON APIFind the vendor for a full or partial MAC from the IEEE registries.JSON FormatterRuns locallyValidate, pretty-print or minify JSON, with a collapsible tree view.XML FormatterRuns locallyValidate, pretty-print or minify XML, with a collapsible tree view.

Six tools have a public JSON API

IP → ASN, ASN, RPKI, ASPA, IRR and MAC lookups answer JSON at https://notoolkit.com/ with no key and no rate limits you’ll ever reasonably hit. The one limit is on the IRR tool’s live queries to RADB, at RADB’s request; answers from our own data are never limited. The Looking Glass and the DNS, SMTP, SSL and STIR/SHAKEN tests open connections from our servers, so they run from their pages only.

API guide IP → ASN Lookup ASN Lookup RPKI Validator ASPA Validator IRR Validator MAC Address Lookup

$ curl 'https://notoolkit.com/?ip=8.8.8.8'
$ curl 'https://notoolkit.com/?rpki=8.8.8.0/24&origin=15169'