# Reported phone numbers in Czech Republic (+420)

> Phone numbers with spam or scam signals observed in Czech Republic, aggregated from independent
> complaint sources and the Numbers Online community. Everything on this page is a
> supplementary signal — advisory, not a verdict — and personal numbers are never listed.

- Numbers with signals: 34
- Reports across sources: 120
- Active last 30 days: 9
- Latest activity: 2026-11-14
- Aggregates refreshed: 2026-11-15

## Recently active numbers (24 shown)

| Number | Trust | Category | Reports | Sources | Last activity | Lookup |
|---|---|---|---|---|---|---|
| +42006072670155 | Low (25/100) | Reported activity | 25 | 1 | 2026-11-14 | https://numbers.online/md/lookup/42006072670155 |
| +420420420 | Very risky (15/100) | Reported activity | 7 | 1 | 2026-11-13 | https://numbers.online/md/lookup/420420420 |
| +42042540 | Very risky (15/100) | Reported activity | 1 | 1 | 2026-11-03 | https://numbers.online/md/lookup/42042540 |
| +42081401 | Very risky (15/100) | Reported activity | 2 | 1 | 2026-11-03 | https://numbers.online/md/lookup/42081401 |
| +42081301 | Very risky (15/100) | Reported activity | 2 | 1 | 2026-11-03 | https://numbers.online/md/lookup/42081301 |
| +42081201 | Very risky (15/100) | Reported activity | 2 | 1 | 2026-11-03 | https://numbers.online/md/lookup/42081201 |
| +4203590865 | Very risky (15/100) | Reported activity | 2 | 1 | 2026-11-03 | https://numbers.online/md/lookup/4203590865 |
| +4201120263 | Very risky (15/100) | Reported activity | 2 | 1 | 2026-11-03 | https://numbers.online/md/lookup/4201120263 |
| +420771522553 | Low (37/100) | Reported activity | 1 | 1 | 2026-10-22 | https://numbers.online/md/lookup/420771522553 |
| +420723352297 | Very risky (15/100) | Phishing / smishing | 1 | 1 | 2026-08-17 | https://numbers.online/md/lookup/420723352297 |
| +420212255930 | Very risky (0/100) | Phishing / smishing | 1 | 1 | 2026-06-27 | https://numbers.online/md/lookup/420212255930 |
| +420728036527 | Very risky (15/100) | Reported activity | 1 | 1 | 2026-06-15 | https://numbers.online/md/lookup/420728036527 |
| +420774480870 | Low (25/100) | Reported activity | 1 | 1 | 2026-06-03 | https://numbers.online/md/lookup/420774480870 |
| +420735558068 | Very risky (0/100) | Reported activity | 45 | 1 | 2021-04-14 | https://numbers.online/md/lookup/420735558068 |
| +420735802410 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420735802410 |
| +420790660690 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420790660690 |
| +420792600007 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420792600007 |
| +420910049890 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910049890 |
| +420910041485 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910041485 |
| +420910044128 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910044128 |
| +420910049320 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910049320 |
| +420770719855 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420770719855 |
| +420797600000 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420797600000 |
| +420798858280 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420798858280 |

Freshness reflects when a source last observed activity — never when we crawled it.
Full history and scoring on each number's lookup page. Trust is 0–100, higher = better.

## What gets reported

- Reported activity — 31
- Phishing / smishing — 2
- Ping call — 1

## Most-reported prefixes

- +420 792 — 7
- +420 910 — 4
- +420 735 — 2
- +420 798 — 2
- +420 060 — 1
- +420 112 — 1
- +420 212 — 1
- +420 223 — 1

Number ranges where signal numbers cluster. A prefix itself is never bad — plenty of
legitimate numbers share it.

## Other countries

- [United States](https://numbers.online/md/browse/us) — 3.2M numbers with signals
- [Poland](https://numbers.online/md/browse/pl) — 129.8K numbers with signals
- [Germany](https://numbers.online/md/browse/de) — 36.3K numbers with signals
- [Lithuania](https://numbers.online/md/browse/lt) — 25.9K numbers with signals
- [United Kingdom](https://numbers.online/md/browse/gb) — 19K numbers with signals
- [Romania](https://numbers.online/md/browse/ro) — 5,082 numbers with signals
- [Italy](https://numbers.online/md/browse/it) — 4,590 numbers with signals
- [Spain](https://numbers.online/md/browse/es) — 4,571 numbers with signals
- [Denmark](https://numbers.online/md/browse/dk) — 3,790 numbers with signals
- [Portugal](https://numbers.online/md/browse/pt) — 3,438 numbers with signals

---

Numbers Online — community-powered phone-number trust signals. Every figure on this
page is a supplementary, low-confidence signal — advisory, not a verdict on any number
or its owner.

- Canonical page (HTML): https://numbers.online/browse/cz
- Report a call: https://numbers.online/report · Listed in error? Request removal: https://numbers.online/opt-out
- Machine guide to the phone-intelligence API: https://numbers.online/llms.txt · OpenAPI: https://numbers.online/api/spec