Is 128.199.121.124 valid?

Domain: 128.199.121.124

Valid: Yes

This domain is valid and should be able to receive e-mail.

Tested MX: 128.199.121.124 (128.199.121.124)

No DNS record. Using IP: 128.199.121.124

Block: No

You do not need to block this domain for signups/registrations.

Disposable: No

This does not look like a temporary/disposable e-mail domain.

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Raw API reason:

IP-address only

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