# 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: 29
- Reports across sources: 120
- Active last 30 days: 1
- Latest activity: 2026-08-17
- Aggregates refreshed: 2026-09-14

## Recently active numbers (24 shown)

| Number | Trust | Category | Reports | Sources | Last activity | Lookup |
|---|---|---|---|---|---|---|
| +420723352297 | Very risky (15/100) | Phishing / smishing | 1 | 1 | 2026-08-17 | https://numbers.online/md/lookup/420723352297 |
| +42034203 | Very risky (15/100) | Reported activity | 5 | 1 | 2026-07-12 | https://numbers.online/md/lookup/42034203 |
| +42094209 | Very risky (15/100) | Reported activity | 7 | 1 | 2026-07-12 | https://numbers.online/md/lookup/42094209 |
| +420212255930 | Very risky (0/100) | Phishing / smishing | 1 | 1 | 2026-06-27 | https://numbers.online/md/lookup/420212255930 |
| +42006072670155 | Low (25/100) | Reported activity | 25 | 1 | 2026-06-21 | https://numbers.online/md/lookup/42006072670155 |
| +420420420 | Very risky (15/100) | Reported activity | 7 | 1 | 2026-06-21 | https://numbers.online/md/lookup/420420420 |
| +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 |
| +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 |
| +420602679540 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420602679540 |
| +420910049890 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910049890 |
| +420910049320 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910049320 |
| +420910044128 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910044128 |
| +420910041485 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420910041485 |
| +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 |
| +420705541790 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420705541790 |
| +420735802410 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420735802410 |
| +420770719855 | Very risky (8/100) | Reported activity | 1 | 1 | 2020-03-04 | https://numbers.online/md/lookup/420770719855 |
| +420223006166 | Very risky (16/100) | Ping call | 1 | 1 | 2019-11-13 | https://numbers.online/md/lookup/420223006166 |
| +420798858222 | Very risky (16/100) | Reported activity | 2 | 1 | 2019-09-23 | https://numbers.online/md/lookup/420798858222 |
| +420792600721 | Very risky (16/100) | Reported activity | 2 | 1 | 2019-09-23 | https://numbers.online/md/lookup/420792600721 |

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 — 26
- Phishing / smishing — 2
- Ping call — 1

## Most-reported prefixes

- +420 792 — 7
- +420 910 — 4
- +420 735 — 2
- +420 798 — 2
- +420 060 — 1
- +420 212 — 1
- +420 223 — 1
- +420 342 — 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) — 3M numbers with signals
- [Poland](https://numbers.online/md/browse/pl) — 87K numbers with signals
- [Germany](https://numbers.online/md/browse/de) — 34.8K numbers with signals
- [Lithuania](https://numbers.online/md/browse/lt) — 25.6K numbers with signals
- [United Kingdom](https://numbers.online/md/browse/gb) — 14.6K numbers with signals
- [Romania](https://numbers.online/md/browse/ro) — 4,911 numbers with signals
- [Italy](https://numbers.online/md/browse/it) — 3,373 numbers with signals
- [Denmark](https://numbers.online/md/browse/dk) — 3,292 numbers with signals
- [Morocco](https://numbers.online/md/browse/ma) — 3,255 numbers with signals
- [Tunisia](https://numbers.online/md/browse/tn) — 2,424 numbers with signals

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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.

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