IP y red

Verificación de IP en listas negras

Checks an IP against 14 DNSBLs (Spamhaus, Barracuda, SpamCop and more) and a domain against 3 domain blocklists — for a domain, both the website and mail server IPs.

Datos clave

Check an IP against blacklists online: enter an IP or domain and see whether the address is on 14 spam lists (Spamhaus ZEN, Barracuda, SpamCop and others) and the domain on 3 domain lists. Free, no sign-up. That is far fewer lists than services checking a hundred or more.

Precio: Gratis
Registro: No necesario
Procesamiento: On our server: parallel DNS queries to 14 IP blocklists and 3 domain blocklists; we never connect to your IP
Entrada: An IPv4 or IPv6 address, a domain or a site URL
Límites: 5 checks per minute; 10 a day without an account, 30 with a free account, unlimited with Pro; for a domain up to 5 addresses (site and mail servers) are checked
Resultado: For each address and list: “listed”, “clean”, “policy” (for example Spamhaus PBL) or “zone unavailable”; a summary of how many lists, the major lists separately and links to delisting pages
Última actualización: 2026-10-26

How to check if an IP or domain is blacklisted

The tool checks an IP address against 14 DNSBLs (Spamhaus ZEN, Barracuda, SpamCop, PSBL, Mailspike, UCEPROTECT and more) and a domain against the Spamhaus DBL, SURBL and URIBL domain lists. For a domain it checks both the website IPs and the mail server IPs from MX. Every list is first tested with a control address, so a list that is down shows "no answer" instead of a false "clean". Listings come with the return code, the reason from the TXT record and a delisting link.

17 IP lists and 3 domain lists, queried in parallel

IPv4, IPv6 and domains (website IPs + mail IPs from MX)

Honest statuses: "no answer" is never shown as "clean"

Listing reason and delisting links

Cómo usar

Enter an IP address (IPv4 or IPv6) or a domain
Wait while all lists are queried in parallel — usually 1–4 seconds
Start with the key lists; for any listing, read the reason and follow the delisting link

FAQ

Enter an IP address, a domain or a site URL and click Check. We query 14 IP blocklists and 3 domain blocklists and show the status for each. No sign-up; the limit is 5 checks per minute and 10 a day for a guest.

That is how we show Spamhaus PBL: the address is in a range from which mail is not expected to be sent directly (for example a home IP). It is not a sign of spam, but mail servers may reject mail from such an address.

We test each list with the addresses 127.0.0.2 and 127.0.0.1. If a list answers wrongly or refuses us, we do not treat its result as reliable and say “unavailable” instead.

Fix the cause (a hacked site, an open relay, spam from the address) and file a request on the list’s page; we show the links next to the result. Only the list owner removes an address.

Seventeen: 14 IP lists (three major ones: Spamhaus ZEN, Barracuda BRBL, SpamCop) and 3 domain lists (Spamhaus DBL, SURBL, URIBL). Services with 100+ lists will find more minor entries.

Yes, for the lists that document IPv6 support. For the other zones the address is skipped, which the report shows.

PromoPilot frente a alternativas: comparación

Comparamos solo lo que está confirmado en las páginas de cada servicio. Donde no pudimos confirmar un dato, la celda muestra "—".

Parámetro	PromoPilot	MxToolbox Blacklist Check	MultiRBL.valli.org	HostingChecker.com IP Blacklist
Number of lists checked	17 (14 IP + 3 domain)	Over 100 DNS-based blacklists	—	Claims over 300 DNS-based blacklists
Check by domain (site and MX)	✓ site IP and up to two MX	✓ accepts a server IP or a domain	✓ IPv4/IPv6 address or domain name	—
Self-test of the lists’ reliability	✓ canary addresses 127.0.0.2 / 127.0.0.1	—	Marks neutral (blue) entries as informational, not blocking; includes an FCrDNS check	—
Free and sign-up	Yes: 5 a minute, 10 a day for a guest	—	A free service	—

Desplaza la tabla hacia los lados

Dónde somos más débiles: several times fewer lists than services with a hundred or more; no monitoring with alerts and no listing history.

Cuándo elegir PromoPilot: When you want to see quickly whether an IP or domain is on the big lists that affect mail delivery, with an honest “zone unavailable” instead of a false “clean”. For full coverage of a hundred lists you need a specialised service.

Comprobado el: 2026-10-16. "—" significa que no está confirmado en la página oficial; las condiciones y los precios cambian, así que consulta los sitios de cada servicio.