BMCX

Site Introduction

An old website online since 2004, formerly known as 51240 Convenience Query Network, and now a comprehensive collection of free online query tools operated in Fujian.

Look up mobile phone number locations, IP addresses, express tracking numbers, and ID card prefixes—no app download, no registration needed; use it directly in your browser. Tools are categorized by life, network, computing, dictionary, health, and more, with hundreds of small tools packed into one site, like a portable toolbox.

Core Features

1. Practical Life Queries

Mobile phone number location, landline numbers, area codes and postal codes, license plate ownership, express delivery tracking, traffic violation entry, weather forecast, perpetual calendar, Chinese almanac auspicious days, 2026 holiday schedule—basically all daily necessities can be found.

2. Computer and Network Tools

IP/domain lookup, internet speed test, QR code generation, random password, OCR text recognition, port scanning, MAC address vendor lookup, timestamp conversion, text comparison, UUID generator—useful for developers and operations staff as well.

3. Calculation and Conversion

Online calculator, personal income tax calculator, loan calculator, early repayment, electricity bill calculation, deposit interest, plus unit conversions for length/area/weight/temperature/volume, and geometric volume calculators are also available.

4. Liberal Arts and Health Tools

English-Chinese dictionary (over 730,000 entries as marked on the official site), Chinese-English dictionary (over 680,000 entries), idioms/poetry/xiehouyu (two-part allegorical sayings), simplified-traditional conversion, Chinese character pinyin; health tools include food calories, safe period calculator, Chinese herbal medicine lookup, etc. AI Gomoku is a small surprise.

Pricing Model

Regular query tools: free to use.

Pricing may change; please refer to the website: https://www.bmcx.com/

Comparison with Similar Platforms

Unique Advantages

1. Large number of tools with detailed categorization—8 major categories including life, network, computing, dictionary, webmaster, and entertainment, covering a wide range of scenarios on a single site
2. Long operating history—copyright information shows operation since 2004, with long-term accumulation of basic data such as number segments and administrative divisions
3. Zero threshold—most tools can be used directly in the browser without installing an app

Practical Highlights

• The homepage has a quick search bar at the top, supporting quick tool location by IP/domain, mobile phone, ID card, phone number, area code, and postal code
• Provides an API/embed page where webmasters can generate iframe code to embed individual tools into their own websites

Objective Limitations

1. Traditional interface—visually and interactively, compared to newer online tool sites, it has a somewhat "old website" feel
2. Some tools rely on external links or third-party data—for example, some traffic violation and phone bill queries redirect to external pages, and experience and stability vary by entry point

Comparison with Similar Tools

Frequently Asked Questions

Q1: Does Bianmin Query Network require registration to use?
Most tools do not require registration; just select a category or use the top search. The site has login/registration entry, but regular query functions do not force an account.

Q2: How accurate is mobile phone number location?
It checks the carrier and location corresponding to the number segment, not real-time positioning. It is sufficient for checking unfamiliar incoming calls, but cannot be used to track a specific individual's location.

Q3: What can an ID card query reveal?
It mainly looks up household registration area information based on the first 6 digits of the administrative division code, and supports converting 15-digit IDs to 18-digit. This is a segment query, not a lookup of complete personal identity information.

Q4: What is the relationship with 51240 Convenience Query Network?
Bianmin Query Network is the continuation of the original 51240 Convenience Query Network, with the domain changed to bmcx.com. Old users searching for "51240" can generally still find it.

Q5: Can I put the tools on my own website?
Yes. Go to the "API/Embed" page, select a tool, adjust width and height, and generate iframe code to embed. Specific restrictions and whether fees apply are subject to the embed page and official site instructions.

Q6: How large is the English-Chinese dictionary data?
The official site marks the English-Chinese dictionary at over 730,000 entries and the Chinese-English dictionary at over 680,000 entries. It is sufficient for daily word lookup, but professional terms or new words may not be fully covered.

Q7: How does the website make money? Will it suddenly charge?
No paid plans for individual users are visible in public information. The site has ads and a WeChat official account (Chenghua Bianmin Query), as well as webmaster API and other cooperation entry points. Specific charging policies are subject to the official website's real-time announcements.