Free telecom tools for data, SMS & China
No sign-up, no ads, runs in your browser where possible.
Data reference
MCC-MNC lookup
Find mobile country and network codes by country, operator or IMSI prefix, with the date each record was last checked.
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Numbering plan explorer
Look up a number prefix to see its range type and original assignee, by country.
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Country telecom market profiles
Open statistics per country, such as population, mobile subscriptions and internet use, from World Bank indicators.
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Speed test
Measure download, upload and latency from your browser against Cloudflare’s nearest measurement edge.
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Coverage explorer
Filter A2P SMS and mobile data availability by country and download the list as CSV.
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Embeddable lookup widget
Add the MCC-MNC lookup to your own site with a snippet that carries its attribution and licence.
Open the toolData & IoT
RFQ checklist
The fields a data, SMS or China RFQ needs, with a reason and a good answer for each.
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Data usage estimator
Estimate monthly GB per traveller or device from typical usage. Volume only, never cost.
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Device export checklist
eSIM, bands, type approval and SMS needs in one RFQ summary
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Band finder
Check operator bands by country, or paste your module's band list to see where it works
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2G/3G network sunset tracker
Announced 2G and 3G switch-off dates by country and operator, each with its source and the date we checked it.
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IoT & eSIM identifier toolkit
Decode and validate ICCID, IMSI, EID, IMEI and LPA activation codes in your browser. Nothing is uploaded.
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EARFCN & NR-ARFCN converter
Convert channel numbers to band and frequency and back, with NB-IoT and LTE-M bands marked.
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Signal quality interpreter
Enter RSRP, RSRQ, SINR or RSSI readings from a module to see how usable the signal is and what to try next.
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IoT battery-life estimator
Estimate battery life for LTE-M and NB-IoT devices from reporting interval, payload and power-saving settings.
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APN & AT command generator
Enter your own APN settings to get AT commands, nmcli lines and Android configuration for a device.
Open the toolMessaging
SMS segment counter
Paste a message to see GSM-7 or UCS-2 encoding, the segment count, and which characters force Unicode.
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Country SMS rules
Verified SMS rules by country, each with its source and the date we last checked it.
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SMS send-window planner
Pick a destination to see local sending hours in your own time zone, with public holidays marked.
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SMS throughput & campaign planner
Turn a message volume and sending window into the throughput you need, or a throughput into campaign duration.
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SMPP & DLR code decoder
Paste a command_status, the stat and err fields of a delivery report or a hex PDU to see what it means and what to check next.
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SMS content pre-check
Check a draft for restricted content categories, public link shorteners and sender ID format before you send.
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China SMS template checker
Check the signature, wording and length of a message bound for China before you submit the template.
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Phone number validator
Check a number’s format, type and original range holder. The carrier shown is the original one, not the current one.
Open the toolChina & network
City-to-city internet latency
Median round-trip times between major cities, measured from independent public probes. Public internet latency, not our network.
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Ping any host from cities worldwide
Ping an IP address or domain from independent public probes (Globalping) in cities worldwide and see round-trip time and packet loss.
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Fiber latency floor
The physical minimum round-trip time between two cities over fiber. Physics only, not our network.
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Cable route finder
Find public submarine cable routes between two places, compare diverse paths to China and Hong Kong, and ask for a quote.
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Which route fits?
Answer a few questions to compare IP transit, CloudBond, DIA/SD-WAN and IEPL/IPLC.
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China-readiness scanner
Enter a URL to list the third-party resources on the page that may be unreachable from mainland China, with a fix list.
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China reachability check
Check how a site answers from measurement points in mainland China, by region and network, with DNS and response time.
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IP to ASN lookup
Enter an IP address or AS number to see the network name and registration country.
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Subnet & CIDR calculator
Work out address ranges, masks and host counts for a CIDR block, and how long a transfer takes at a given rate.
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My IP & network check
See the public IP address you browse with, your network and approximate location, plus WebRTC privacy and latency checks.
Open the toolWhat we don’t offer, and why
- Traceroute, MTR, BGP views or a looking glass
- Hop-by-hop and routing views from our network would show how traffic is carried, which we keep confidential. Our network tools stop at ping and response timing.
- Live HLR or number portability lookups
- Each live lookup queries a third party’s number and personal data. The phone number validator checks format and allocated ranges in your browser instead.
- Consumer eSIM compatibility checks
- This site serves businesses buying wholesale, and whether a given phone supports eSIM is for its maker to confirm.
- Submarine cable or PoP maps
- A map of cables and sites would suggest how a given route is carried. The fiber latency floor gives the physical minimum between two cities instead.