Network Tools

Your IPv4 and IPv6 addresses, ISP, ASN, location, and reverse DNS.

WHOIS, open ports, CVEs, ISP data, and external threat intel links for any IP or domain.

Query A, AAAA, MX, NS, TXT, CNAME, SOA, PTR, CAA and SRV records via Cloudflare DoH.

Look up any TCP/UDP port's registered service, or search by service name. Full IANA registry, refreshed monthly.

Stack GRE, VXLAN, MPLS, IPsec and more, then see the exact interface MTU to configure on IOS/IOS-XE, IOS-XR, Junos, and Arista EOS.

Paste raw traceroute, tracert, or ping output and get an instant hop chain or latency chart — timeouts, latency jumps, and dropped packets flagged automatically.

Paste optics diagnostics output (Junos or Cisco IOS-XR) and see Tx/Rx light levels, laser bias, and temperature plotted against your optic's own alarm thresholds — with plain-English findings.

See the byte cost of stacking 802.1Q/QinQ tags, then check whether two vendors will actually interoperate — outer-tag TPID mismatches are the most common reason a QinQ trunk breaks across platforms.

Look up any ASN or IP prefix — announced routes, upstream peers, and WHOIS data.

Convert standard communities between ASN:VALUE and decimal/hex, recognize well-known communities, and validate large communities.

Compute OSPF cost, EIGRP composite metric, and IS-IS path metric — per hop and total.

Test regular expressions live with match highlighting. BGP community filtering, AS path matching, and JunOS policy examples built in.

Interactive subnet calculator with divide and join — split any network visually.

Calculate IPv6 network address, range, prefix length, and total host count.

Find the vendor that registered a MAC address's OUI, and detect locally-administered/randomized addresses.

Paste a list of prefixes and get back the smallest set of CIDR blocks that covers them all.

Convert a network/prefix into its wildcard mask, with ready-to-paste ACL and OSPF network statement lines.

Give it a base network and host-count requirements, get back an efficiently packed variable-length subnet plan.

Paste an address to see if it's private, public, loopback, link-local, multicast, or a documentation range.

Decrypt Cisco IOS Type 7 (reversible XOR) password strings from your running config.

Decrypt Juniper JunOS $9$ encrypted passwords from your device configuration.

Generate the current MFA code for a Base32 secret — the same RFC 6238 algorithm authenticator apps use.

Random characters, word-based passphrases, transform your own phrase, or a cruise-themed passphrase. All via crypto.getRandomValues.

Test Jinja2 templates live in your browser. Loops, conditionals, filters, macros. Ansible & Nornir examples built in. Powered by Nunjucks — no server needed.

Enter text, Base64, hex, or binary and get every other representation at once. Full UTF-8 support.

Validate YAML syntax with exact line/column error locations, plus a one-click reformat. Built-in examples for Ansible inventories, Nornir hosts, and multi-document streams.

Drop in a SecureCRT XML session export and get a ready-to-import SuperPutty Sessions.xml back instantly — folder hierarchy, protocol mapping, and skip reporting all handled in your browser.

Generate site-to-site IPsec configs for Cisco IOS/ASA, FortiGate, Palo Alto, Juniper SRX, strongSwan/VyOS, UniFi, and pfSense/OPNsense — one side or both at once. Automatically handles the policy-based ↔ route-based proxy-ID interop case.

Generate a Junos lo0 Routing Engine protection filter — BGP/NTP/SNMP/RADIUS source-restricted, rate-limited ICMP, anti-spoofing, fragments, and a logged catch-all discard, correctly ordered.