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+34 921 210 400

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
Scam
Category
1
Spam reports
18 Mar 2026
Last report

AI Analysis

Limited information but with fraud indicators. The number +34921210400 has been reported by several users in Spain for making calls posing as energy advisory services, collaborating with companies like Endesa or Iberdrola, to deceive users about changes in their electricity contracts without consent.

Likely purpose: Financial fraud through deception about energy services

Most common user complaints

  • Se hace pasar por asesoría energética
  • Dice haber cambiado el contrato de luz sin consentimiento
  • Engaño sobre colaboración con Endesa, Iberdrola, etc.
  • Menciones de múltiples números utilizados para el mismo fraude
High dangerBlockEnergyCompany impersonationFake prize

AI analysis: 4 days ago

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 It may contain errors or be out of date, and is not legal advice or a verified accusation against the number's owner.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

8 this week

Last 7 days

Community comments

3
Anónimo
4 Sept 2025

Buenas tardes pienso y digo lo mismo que los comentarios anteriores, llevo llamadas por cuatro o cinco números distintos, estos hijos de **** a vivir de lo robado a los incautos ciudadanos y si son mayores de edad mejor para engañarlos, entiendo que tanto esta gentuza como las operadoras deberían ser los culpables, perseguirlos y sanciones durísimas en el importe económico y penales incluso, ya esta bien de molestar y robar. Dicho sea de paso todos los tengo bloqueados.

Anónimo
6 Oct 2022

Se hace pasar por una asesoría energética que colaboran con Endesa, Iberdrola etc. Te dicen que te han hecho una revisión de tu contrato y que te lo han cambiado para mejorarte el precio. Cuando le digo que no puede hacer eso sin mi consentimiento me dice que es por ley. Y entonces he colgado. He llamado a mi compañía y me confirma que es un engaño.

Anónimo
26 Sept 2022

otro que me quiere tangar... dice que tengo un problema con la facturación de la luz¡anda a la ***** hombre!

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Signal summary for +34 921 210 400

+34 921 210 400 belongs to the 921 prefix and is classified as Scam. This page combines 1 approved report and 3 public comments to explain the risk level.

Frequently asked questions

Who calls from +34 921 210 400?
+34 921 210 400 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 +34 921 210 400 a spam number?
According to the community, +34 921 210 400 has 1 report, which suggests it is likely spam. Check the risk score and comments for details.
Is it safe to call +34 921 210 400 back?
If you don't recognise the number and it has negative reports, it's best not to call +34 921 210 400 back. Avoid sharing personal or banking details with unknown numbers.
How can I block +34 921 210 400?
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 +34 921 210 400.
Where can I report a suspicious call?
You can report +34 921 210 400 directly on this page using the report button. Your contribution helps other users identify unwanted calls.