NoCall

+34 921 210 404

Risk level: High

Who is this? Spam, telemarketing or a legitimate call? Community reports in Spain.

Number with prefix 921. Review community reports, risk and comments below before answering or blocking. Browse numbers with prefix 921

High
Risk level
Telemarketing
Category
1
Spam reports
18 Mar 2026
Last report

AI Analysis

Limited but indicative information of suspicious activities. The number +34921210404 has been reported several times by users in Spain, associating it with spam calls and potential scams. Complaints include calls posing as police or state security services to offer home alarms, as well as alleged utility bill (electricity and water) verifications where callers know the recipient's name and address but lack other relevant details, even inventing information.

Likely purpose: The probable purpose is to carry out scams or spam, either by offering security services fraudulently or extracting personal information under the pretext of verifying utility bills.

Most common user complaints

  • Llaman para ofrecer alarmas de seguridad mencionando a la policía o seguridad del estado.
  • Preguntas sobre facturas de servicios (luz, agua) con conocimiento de nombre y dirección pero no de otros datos.
  • Inventan información durante la llamada.
High dangerBlockNo identificadaTelecommunicationsMissed call

AI analysis: 24 Jul 2026

Information based on community reports and automated analysis. It may contain errors or be out of date, and is not legal advice or a verified accusation against the number's owner.

CT

Colt Technology Services

COLT TECHNOLOGY SERVICES, S.A. UNIPERSONAL

Country:
ESSpain
Prefix:
92121
Type:
Landline
Province:
Segovia
Community:
Castilla y León
Assigned since:
12/12/2008

Recent searches

7 this week

Last 7 days

Community comments

3
Anónimo
18 Nov 2022

A mi me acaban de llamar, hablo de policía, de seguridad del estado y todo para ofrecerme alarma para casa.

Anónimo
21 Oct 2022

Llaman para pedir datos con respecto a la factura de la luz, refiriéndose por el nombre y la dirección de la persona a la que llaman, pero luego no saben ningún dato más, incluso se los inventan.

Anónimo
13 Oct 2022

Es una estafa, tratan de preguntarte por los contadores del agua

Report this number

What happened?

Spam numbers with prefix 92121

See all with prefix 921

Related numbers with prefix 92121

See all with prefix 921

Signal summary for +34 921 210 404

+34 921 210 404 belongs to the 921 prefix and is classified as Telemarketing. This page combines 1 approved report and 3 public comments to explain the risk level.

Frequently asked questions

Who calls from +34 921 210 404?
+34 921 210 404 is a phone number with the 921 prefix in Spain. It has been reported 1 time by the community as a possible unwanted call. Check the comments to find out who might be behind this call.
Is +34 921 210 404 a spam number?
According to the community, +34 921 210 404 has 1 report, which suggests it is likely spam. Check the risk score and comments for details.
Is it safe to call +34 921 210 404 back?
If you don't recognise the number and it has negative reports, it's best not to call +34 921 210 404 back. Avoid sharing personal or banking details with unknown numbers.
How can I block +34 921 210 404?
On iPhone, go to Recents in the Phone app, tap the (i) next to the number and choose 'Block this Caller'. On Android, long-press the number in your call history and select 'Block number'. You can also use the NoCall app to automatically block calls like +34 921 210 404.
Where can I report a suspicious call?
You can report +34 921 210 404 directly on this page using the report button. Your contribution helps other users identify unwanted calls.