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Directory/Categories/MJ12bot/v1.4.8
MJ

MJ12bot/v1.4.8

UndecidedCommunity-sourced

MJ12bot/v1.4.8 is a web crawler developed by Majestic-12 Ltd, a UK-based company specializing in search engine technologies. This bot is designed to map the link relationships between websites, contributing to the creation of a comprehensive search engine. It operates by crawling the web and collecting data on website interconnections, which is then used to build a public backlinks index accessible through Majestic's Site Explorer. The MJ12bot/v1.4.8 user agent string is: Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/) This indicates that the bot identifies itself as MJ12bot version 1.4.8 and provides a link to its official website for more information. ( user-agents.net ) MJ12bot adheres to the robots.txt standard, allowing website owners to control its access to their sites. To block MJ12bot from crawling a website, the following directive can be added to the site's robots.txt file: This instructs MJ12bot to refrain from accessing any pages on the site. For more detailed information about MJ12bot and its functionalities, you can visit its official website at mj12bot.com .

Undecided
Assessment
Uncategorized
Category
Bot
Kind
1
Data sources

Identification

Bot name
MJ12bot/v1.4.8
Category
Uncategorized
Verification
Community-sourced
User-agent string
Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)

IP ranges

Requests from MJ12bot/v1.4.8 originate from these published ranges. For strict verification, match the source IP against this list in addition to checking the user-agent and reverse-DNS.

Showing 24 of 497 ranges

Block or allow MJ12bot/v1.4.8

Block it

Add a Disallow rule for Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/) in your robots.txt file. You can also block at the server level using your web server configuration or CDN firewall rules to filter requests matching the user-agent string.

# Block MJ12bot/v1.4.8 from crawling your entire site
User-agent: Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)
Disallow: /

# Allow MJ12bot/v1.4.8 full access
User-agent: Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)
Allow: /
Allow & verify

Ensure your robots.txt allows Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/). Verify requests by checking the user-agent string.

Traffic & trends

Cloudflare Radar traffic

No Cloudflare traffic data available.

Google Trends interest

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Links & references

Operator documentation
mj12bot.com
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Data sources

This profile is compiled from the following sources.

CrawlersDatabase
Last updated September 8, 2026

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