Network Tools
IP utilities, traceroute maps, and data-center planning calculators (PUE, cooling, rack heat, CFM).
What Is My IP Address
Instantly view your current public IP address, ISP, city, region, country, and timezone powered by ipinfo.io.
IP/URL/Website Lookup
Look up an IP address, website URL, or hostname: resolve DNS, then see ISP, city, country, and approximate geolocation on an OpenStreetMap map.
DNS Lookup
Look up DNS records for any domain: A, AAAA, MX, TXT, SPF, DKIM, DMARC, CNAME, NS, SRV, and SOA. Filter by record type or fetch all at once.
WHOIS Lookup
Look up WHOIS registry data for any domain: registrar, creation and expiry dates, status codes, and the full raw WHOIS response.
Email Health Checker
Check email authentication for any domain: validate SPF syntax, find DMARC policy, scan DKIM selectors, and confirm MX records for deliverability.
Visual Traceroute
Run an MTR-style traceroute and visualize each resolved hop on an OpenStreetMap map from source to destination.
Internet Speed Test
Measure download and upload speed in an embedded browser test. Traffic goes to the third-party test provider; this page only embeds their UI.
PUE Calculator (Data Center Efficiency)
Compute Power Usage Effectiveness (PUE) from IT load and total facility power, with an efficiency rating and non-IT overhead summary.
Cooling Load Calculator (Server Room / HVAC)
Estimate sensible cooling load (kW, BTU/hr, US tons) from equipment heat, room size, ambient vs indoor temperature, and tunable overhead.
Rack Heat Load Calculator
Convert server or rack electrical watts into heat rejection (BTU/hr and kW thermal) for rack-level and CRAC planning.
Airflow (CFM) Calculator
Estimate required CFM for sensible cooling using Q ≈ 1.08 × CFM × ΔT (°F) with heat load in kW.
Internet & Wi‑Fi Plan Calculator
Answer questions about streaming, gaming, guests, uploads, and smart home devices. Get live minimum and comfortable broadband speed estimates.
Starlink Internet Plan Calculator
Same usage questionnaire as our ISP planner, mapped to Starlink typical speeds, unlimited residential data, and Business Priority TB pools. Live estimates only.
Mobile / Cellular Plan Calculator
Indicative cellular data allowance and radio generation fit from IoT telemetry through 4G/5G heavy tethering. Roaming, SMS, and bundles are not modeled.
Subnet Calculator
Analyze IPv4 CIDR in detail: subnet mask, wildcard mask, network/broadcast, host range, binary view, class/type detection, and split planning.
IPv6 Subnet Calculator
Calculate IPv6 subnet network boundaries, expanded/compressed notation, address capacity, split counts, and reverse DNS pointer format.
Wildcard Mask Calculator
Convert an IPv4 subnet mask or CIDR prefix to its wildcard mask (255 minus each octet) with host block size.
MAC Address Format Standardizer
Normalize any 48-bit MAC into IEEE colon, Windows hyphen, and Cisco period formats plus OUI extraction.
ACL Generator
Build copy-pasteable Cisco IOS access-list commands with IP, wildcard, protocol, and port keywords.
VLAN Configurator
Generate VLAN database and access/trunk interface configuration for Cisco and Juniper switches.
FHRP Generator
Generate Hot Standby Router Protocol (HSRP) and VRRP configuration for primary and backup routers.
IP Packet Header Builder
Educational IPv4 and TCP header field builder with binary, hex, and assembled raw payload output.
Syslog Severity / Facility Decoder
Decode syslog priority values into facility and severity names from raw messages or PRI integers.
Bandwidth & Throughput Calculator
Estimate file transfer duration over a link with configurable TCP/IP overhead percentage.
CIDR to IP Range Exploder
Expand an IPv4 CIDR block into network, usable hosts, broadcast, and a copy-pasteable address list.
Cisco Type 7 / Type 5 Password Decoder
Decrypt Cisco Type 7 obfuscated passwords; identify Type 5 MD5-crypt hashes (not reversible).
SSH Key Fingerprint Checker
Compute OpenSSH MD5 and SHA256 fingerprints from a public key to verify host or user keys.
IPv4 to IPv6 Mapped Address Converter
Convert IPv4 addresses to IPv6-mapped (::ffff:) and legacy IPv4-compatible (::) formats with binary and hex output.
VoIP Bandwidth & MOS Estimator
Calculate concurrent VoIP bandwidth with Ethernet/VLAN overhead and estimate MOS from packet loss and jitter.
DNS Record & TTL Parser
Parse BIND-style DNS records into type, value, TTL duration, and caching advisory.
Interface Link Utilization Calculator
Compute interface throughput and utilization percent from octet counter deltas with 64-bit wrap handling.
BGP AS Path Parser
Parse BGP AS_PATH attributes including AS_SET blocks, prepending, and private ASN detection.
OSPF Cost Calculator
Calculate OSPF interface cost from link speed and reference bandwidth with Cisco auto-cost guidance.
EIGRP Metric Calculator
Compute classic 32-bit and wide 64-bit EIGRP composite metrics from bandwidth, delay, and K-values.
BGP Route Selection Simulator
Compare two BGP paths step-by-step: weight, local-pref, AS_PATH, origin, MED, and eBGP vs iBGP.
Route Summarization Calculator
Find the tightest summary route for a list of IPv4 subnets and detect summary holes.
BGP Community Decoder
Parse and decode BGP community strings with RFC well-known actions and ISP vendor presets.
IPv6 Nibble Boundary Planner
Partition provider IPv6 blocks (/32, /48) with nibble-boundary checks and sequential assignment listing.
MPLS Label Stack Visualizer
Simulate MPLS label stack operations hop-by-hop with penultimate hop popping (PHP) visualization.
MTU & MSS Tunnel Calculator
Calculate effective MTU and TCP MSS after GRE, IPsec, VXLAN, PPPoE, and QinQ tunnel overheads.
CGNAT Port-Block Calculator
Plan carrier-grade NAT port blocks, max subscribers, and oversubscription on limited public IPv4 pools.
Baud Rate to Bytes/sec
Effective payload bytes per second from baud and bits per character (start/data/stop).