# Phone Quality Indicators

> Quality indicator codes returned in quality.phones by the Egon Phone validation service, with the meaning of each code.

Reference codes returned in `quality.phones` by the Egon Phone validation service.

## Quality Codes

Detailed quality indicators describing telephone number formatting, country dial-in additions, area codes, and prefix consistency.

| Flag | Code | Description |
| --- | --- | --- |
| 0 (OK) | 0 | OK |
| 1 (Changed) | 970 | Format corrected |
| 1 (Changed) | 971 | Italian dial-in code added |
| 1 (Changed) | 972 | Extra information separated from phone number |
| 1 (Changed) | 973 | National dial-in code added |
| 1 (Changed) | 974 | Contradictory phone type and prefix |
| 1 (Changed) | 975 | Old prefix found |
| 1 (Changed) | 976 | International phone found |
| 1 (Changed) | 977 | Isolated digits removed |
| 1 (Changed) | 978 | Phone number composed by 4 digits |
| 1 (Changed) | 979 | Same digit repetition with valid prefix |
| 1 (Changed) | 980 | Different phone numbers found |
| 1 (Changed) | 981 | Phone type information |
| 1 (Changed) | 982 | Missing prefix with ambiguous locality |
| 1 (Changed) | 983 | Too many phone numbers |
| 1 (Changed) | 984 | International dial-in code added |
| 1 (Changed) | 985 | Phone number starting with zero |
| 2/3 (Not valid) | 442 | Missing prefix |
| 2/3 (Not valid) | 470 | Wrong phone number |
| 2/3 (Not valid) | 471 | Phone number not present |
| 2/3 (Not valid) | 472 | Phone number 0 |
| 2/3 (Not valid) | 473 | Too many numbers |
| 2/3 (Not valid) | 474 | Same digit repetition |
| 2/3 (Not valid) | 475 | Prefix not found for Country |
| 2/3 (Not valid) | 476 | Prefix not congruent with Locality |