GeoNames Forum

Hi Marc / GeoNames team,

Posting this as part of a team utilizing the premium postal-code dataset, overall I'm very happy with the dataset — thank you for maintaining it. I just finalized a large-scale comparison of the 202608 premium release against real-world shipment postal codes and found a set of codes that appear to be genuinely valid (verified against national postal authority sources) but absent from the premium files. Reporting them here as requested by the readme ("Please let us know if you find any errors in the data set").

Canada (CA_full.csv.zip) — the file appears to lag Canada Post's newer LDU assignments, particularly for large new buildings. Two high-volume examples where the neighbouring LDUs are present but the code itself is missing:

- N5W 0C2 (London ON — N5W 0C1 is present)
- G2B 0S6 (Québec City — G2B 0S1 through 0S5 are present)
We have roughly 7,900 more validly-formatted CA codes in the same pattern (FSA present in the file, LDU missing) — happy to share the full list as a CSV if useful. Could you share what source feeds CA_full and how frequently it syncs with Canada Post assignments?

United Kingdom (GB_full.csv.zip) — the readme notes the Royal Mail data is "copyright and database right 2022". I'm seeing valid post-2022 codes missing, e.g. BT34 3YP (Newry, NI — confirmed active via ONS/postcodes.io). Are there plans to refresh the underlying Royal Mail/ONS snapshot? (Code-Point Open / ONSPD are refreshed quarterly under OGL, in case that helps.)

Greece (GR.zip) — the file has 777 distinct codes, but Greece has roughly 1,000+. The missing ones include ordinary, populated Athens-metro codes, e.g. 154 52, 153 43 (Agia Paraskevi), 166 73 / 166 74 (Glyfada), 145 62 (Kifisia). Is fuller ELTA coverage on the roadmap? Full list of ~175 codes available.

Lithuania (LT.zip) — the file has ~2,000 codes; Lithuania's system has ~16,500 street-level codes (e.g. LT-47492, Kaunas, is valid but absent). Is street-level LT data obtainable under a compatible license?

South Korea (KR.zip) — coverage looks near-complete (34,249 codes), just a small number of valid codes missing, e.g. 05416 (Sangil-dong, Gangdong-gu, Seoul).

I understand Ireland and Malta are limited to routing keys / first letters for copyright reasons, so I'm not asking about those.

Happy to provide the full verified lists per country as CSVs, and glad to help test pre-release data if that's ever useful. Thanks again for the dataset and for any insight into the CA_full sourcing question in particular.