# Reported phone numbers in Japan (+81)

> Phone numbers with spam or scam signals observed in Japan, 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: 1,612
- Reports across sources: 73.7K
- Active last 30 days: 495
- Latest activity: 2026-10-25
- Aggregates refreshed: 2026-10-25

## Recently active numbers (24 shown)

| Number | Trust | Category | Reports | Sources | Last activity | Lookup |
|---|---|---|---|---|---|---|
| +817026354204 | Very risky (10/100) | Phishing / smishing | 6 | 1 | 2026-10-25 | https://numbers.online/md/lookup/817026354204 |
| +81120994617 | Low (21/100) | Phishing / smishing | 39 | 2 | 2026-10-25 | https://numbers.online/md/lookup/81120994617 |
| +819057709492 | Very risky (15/100) | Phishing / smishing | 13 | 2 | 2026-10-25 | https://numbers.online/md/lookup/819057709492 |
| +818090027296 | Very risky (10/100) | Phishing / smishing | 37 | 1 | 2026-10-25 | https://numbers.online/md/lookup/818090027296 |
| +818086589647 | Low (35/100) | Robocall | 59 | 2 | 2026-10-25 | https://numbers.online/md/lookup/818086589647 |
| +818085739522 | Very risky (10/100) | Phishing / smishing | 8 | 1 | 2026-10-25 | https://numbers.online/md/lookup/818085739522 |
| +818078484493 | Low (30/100) | Robocall | 5 | 1 | 2026-10-25 | https://numbers.online/md/lookup/818078484493 |
| +818028994921 | Very risky (10/100) | Phishing / smishing | 54 | 1 | 2026-10-25 | https://numbers.online/md/lookup/818028994921 |
| +818020591381 | Fair (40/100) | Robocall | 11 | 1 | 2026-10-25 | https://numbers.online/md/lookup/818020591381 |
| +815068636831 | Very risky (10/100) | Phishing / smishing | 7 | 1 | 2026-10-25 | https://numbers.online/md/lookup/815068636831 |
| +818005003931 | Fair (40/100) | Robocall | 152 | 1 | 2026-10-25 | https://numbers.online/md/lookup/818005003931 |
| +817038621460 | Low (30/100) | Phishing / smishing | 8 | 2 | 2026-10-25 | https://numbers.online/md/lookup/817038621460 |
| +815031295786 | Low (21/100) | Telemarketing | 40 | 2 | 2026-10-24 | https://numbers.online/md/lookup/815031295786 |
| +81120499477 | Low (21/100) | Phishing / smishing | 9 | 2 | 2026-10-24 | https://numbers.online/md/lookup/81120499477 |
| +818007004107 | Low (21/100) | Telemarketing | 12 | 2 | 2026-10-24 | https://numbers.online/md/lookup/818007004107 |
| +81264030748 | Low (30/100) | Phishing / smishing | 10 | 2 | 2026-10-24 | https://numbers.online/md/lookup/81264030748 |
| +81525592761 | Low (30/100) | Telemarketing | 8 | 1 | 2026-10-24 | https://numbers.online/md/lookup/81525592761 |
| +81527285542 | Low (30/100) | Telemarketing | 5 | 1 | 2026-10-24 | https://numbers.online/md/lookup/81527285542 |
| +81570069911 | Low (30/100) | Phishing / smishing | 22 | 1 | 2026-10-24 | https://numbers.online/md/lookup/81570069911 |
| +815054821341 | Low (30/100) | Telemarketing | 11 | 1 | 2026-10-24 | https://numbers.online/md/lookup/815054821341 |
| +815052912395 | Fair (40/100) | Robocall | 4 | 1 | 2026-10-24 | https://numbers.online/md/lookup/815052912395 |
| +815031751006 | Low (30/100) | Phishing / smishing | 7 | 1 | 2026-10-24 | https://numbers.online/md/lookup/815031751006 |
| +81523101092 | Low (30/100) | Telemarketing | 12 | 1 | 2026-10-24 | https://numbers.online/md/lookup/81523101092 |
| +815031203652 | Low (30/100) | Robocall | 9 | 1 | 2026-10-24 | https://numbers.online/md/lookup/815031203652 |

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

- Phishing / smishing — 586
- Telemarketing — 395
- Survey — 164
- Robocall — 118
- Silent / hang-up — 101
- Reported activity — 90
- Ping call — 80
- Debt collection — 50

## Most-reported prefixes

- +81 800 — 153
- +81 503 — 133
- +81 505 — 129
- +81 120 — 127
- +81 801 — 61
- +81 802 — 58
- +81 703 — 57
- +81 501 — 54

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) — 3.1M numbers with signals
- [Poland](https://numbers.online/md/browse/pl) — 115.6K numbers with signals
- [Germany](https://numbers.online/md/browse/de) — 36K numbers with signals
- [Lithuania](https://numbers.online/md/browse/lt) — 25.8K numbers with signals
- [United Kingdom](https://numbers.online/md/browse/gb) — 17.4K numbers with signals
- [Romania](https://numbers.online/md/browse/ro) — 5,046 numbers with signals
- [Italy](https://numbers.online/md/browse/it) — 4,438 numbers with signals
- [Denmark](https://numbers.online/md/browse/dk) — 3,597 numbers with signals
- [Spain](https://numbers.online/md/browse/es) — 3,350 numbers with signals
- [Morocco](https://numbers.online/md/browse/ma) — 3,328 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.

- Canonical page (HTML): https://numbers.online/browse/jp
- 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