Before you warm up that IP — check the neighborhood.

Your dedicated IP shares a /24 block with 253 other addresses. The senders already there determine how fast Gmail trusts you — before you send a single email.

Cold email / dedicated IP

Is your new SendGrid IP in a gold block or a ghost town? Know before you waste 6 weeks warming up.

VPS / transactional email

Did your Linode or Vultr IP inherit a dirty reputation from the previous tenant?

Buying a /24 block

Full neighborhood audit before you spend $10K. Blacklists, occupancy, adjacent blocks, negotiation price.

MXToolbox tells you if your IP is blacklisted.
We tell you if your neighborhood is worth living in.
Free score · No signup · All 254 IPs audited in 60 seconds · See example report

Why this matters

The /24 neighborhood effect: why your IP's neighbors determine your inbox rate IPv4 block reputation: how /24 quality affects what you pay Why your emails go to spam (it's not always your content) How to check if your IP is blacklisted and get delisted Got a new VPS? Check your IP before you deploy Dedicated IP warmup: the complete guide Due diligence checklist for buying an IPv4 /24 block What is IP neighborhood reputation