Free · No sign-up · No API key
The NOC Operator Toolkit
notoolkit.com
A small, growing set of fast, no-nonsense tools for network operators: the ones I kept wishing existed.
I spend my days in a NOC, and I kept hitting the same wall: the tools I needed were either buried behind 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 keys, 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.
Tools
Pick a tool
Everything here is free and runs in your browser or against a free public API.
IP → ASN Lookup
Map any IPv4 or IPv6 address (or CIDR prefix) to its originating ASN using longest-prefix-match against a live RouteViews BGP table. Returns the matched prefix, ASN, and RIR WHOIS.
Open tool →
ASN Lookup
Look up the registrant details for any autonomous system, plus the full list of prefixes it currently originates in the global routing table.
Open tool →
BGP Looking Glass
Look up any IPv4 or IPv6 address or prefix in live full routing tables. Compare AS paths, next hops, communities and route age across every peer.
Open tool →
RPKI Validator
Check whether an AS is authorised to originate a prefix, against the live ROA set from all five RIR trust anchors. Shows every covering ROA and why the answer is what it is.
Open tool →
IRR Validator
Look up route objects, as-sets, aut-nums and maintainers across every mirrored routing registry at once. Expand an as-set to the ASNs a filter built from it would let in.
Open tool →
MAC Address Lookup
Paste a full or partial MAC address and find the organisation the block is assigned to, from the IEEE MA-L, MA-M and MA-S registries. Refreshed daily.
Open tool →
SMTP TLS Test
Give it an email address or a domain. It finds the MX servers, negotiates STARTTLS, validates the certificate, and shows you the entire SMTP transaction with timings.
Open tool →
JSON Formatter
Paste, validate, and pretty-print JSON, or minify it. Browse large payloads with a collapsible tree view. Everything runs locally in your browser.
Open tool →
XML Formatter
Paste, validate, and pretty-print XML, or minify it. Browse documents with a collapsible tree view. Everything runs locally in your browser.
Open tool →