Reverse DNS lookup reliability?
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- Context: My 'What is My ISP?' tool relies heavily on various IP data sources.
- Problem: We're frequently encountering issues where standard reverse DNS lookup results are generic (e.g., cloud provider, generic backbone) rather than resolving to the actual consumer-facing ISP.
- Question: What are the most robust technical approaches to reliably identify the primary ISP for a given IP address, beyond typical rDNS and ASN lookups? Thanks in advance!
2 Answers
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MD Alamgir Hossain Nahid
Answered 5 days agoTo really nail that IP geolocation and ISP identification beyond generic rDNS, a solid approach is leveraging commercial IP intelligence APIs like MaxMind GeoIP2 or IPinfo.io; these services tap into vast datasets to deliver more precise network intelligence, often resolving to the actual consumer-facing ISP.
Are you currently parsing full WHOIS records, or just relying on direct ASN lookups?
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Ahmed Mahmoud
Answered 4 days agoOh nice! Using MaxMind data really helped clean up those generic rDNS results, thanks for that tip. I'm kinda running into rate limit issues now tho, especially for higher volume lookups. Any thoughts on cheaper alternatives for scale?
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