Is fourstring.co.uk valid?

fourstring.co.uk is a valid domain that should be allowed to do sign-ups and registrations. Based on our analysis, you should allow this domain.

Raw API JSON response:

{
    "valid": true,
    "block": false,
    "domain": "fourstring.co.uk",
    "base_domain": "fourstring.co.uk",
    "text": "Looks okay",
    "reason": "No anomaly detected",
    "risk": 15,
    "is_disposable": false,
    "is_email_forwarder": false,
    "is_public_free": false,
    "is_public_premium": false,
    "is_business_provider": false,
    "is_isp_email": false,
    "is_email_api": false,
    "is_web_hosting_email": false,
    "is_self_hosted": true,
    "is_parked": false,
    "is_role_based_email": false,
    "mx_host": "fourstring.co.uk",
    "mx_ip": "149.255.58.133",
    "mx_info": "Using MX pointer fourstring.co.uk from DNS with priority: 0",
    "mx_fallback": false,
    "mx_hosts": [
        "fourstring.co.uk"
    ],
    "mx_ips": [
        "149.255.58.133"
    ],
    "mx_priorities": {
        "fourstring.co.uk": 0
    },
    "email_provider": null,
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": 2344,
    "domain_created_at": "2019-12-07T00:00:00+00:00",
    "block_status_changed_at": "2026-03-15T06:36:27+00:00"
}