What does a GY1 postcode tell you?

That the address lies in the GY1 district of the GY (Guernsey) postcode area. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,240 live postcodes.

GY1 postcode district

GY1, in the GY (Guernsey) postcode area, has 1,240 live and 72 terminated postcodes in the ONS Postcode Directory of August 2026. Guernsey is a Crown Dependency, not part of Great Britain, and OS Open Names does not cover it.

postcode area	GY (Guernsey)
live postcodes	1,240
terminated postcodes	72
sectors	6
directory release	2026-08

Postcodes and sectors

1,240 of the district's 1,312 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there.

sector	live	terminated
GY1 1	346	10
GY1 2	251	7
GY1 3	353	38
GY1 4	143	10
GY1 6	139	6
GY1 7	8	1

Places OS Open Names lists for GY1

OS Open Names does not cover Guernsey, so it lists no place for the district's postcodes.

Roads filed under GY1

OS Open Names covers Great Britain only and does not reach Guernsey, so a street in GY1 cannot be confirmed from the register and the lookup answers about the postcode alone.

Check an address in GY1

Common questions about GY1

What does a GY1 postcode tell you?: That the address lies in the GY1 district of the GY (Guernsey) postcode area. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,240 live postcodes.

Where the counts come from

ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Other districts in GY

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