What grid square is Amsterdam?

JO23 is the live DXRadar reference square for Amsterdam. The exact portable or home QTH may vary within the square, but this page tracks the center of JO23 for planning propagation.

How do I find my grid square?

Use a Maidenhead grid lookup from your GPS coordinates or street address, then compare that grid with the nearby squares linked on this page. A 4-character grid is enough for most HF planning.

What bands are open in JO23 right now?

JO23 is currently rated GOOD. The best bands right now are 10m, 12m, 15m, 17m, 20m, with 10m as the main band to watch first.

HomeSFI --K ---:-- UTC

Grid JO23 Band Conditions — Amsterdam

Localized HF conditions for Maidenhead locator JO23. Coordinating at 53.50°, 5.00°. Updated with real-time telemetry from NOAA and DX cluster reports.

JO23 conditions are GOOD. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.

Regional Radar

SFI

137

K-Index

2 Kp

Center Coords

53.5, 5.0

Local Phase

Daylight

Grayline window

Sunrise 03:39 UTC

Sunset 19:55 UTC from JO23

From Amsterdam, work the 03:39 UTC and 19:55 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses JO23.

Best band now

10m

10m and 15m typically deliver the most consistent Europe outbound DX while solar flux remains healthy.

Closest operating hub

Amsterdam

This square sits in Western/Central Europe footprint and is best used as a planning center for portable, field-day, and home-station band decisions.

Latitude zone: upper mid-latitude
Local phase: Daylight
Aurora exposure: low at this latitude
Grayline: 03:39 UTC / 19:55 UTC
Best high band: 10m
Nearest city: Amsterdam

● Local Band Quality Scorings

Use this local score for JO23, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.

10m

EXCELLENT

15m

EXCELLENT

20m

GOOD

40m

POOR

80m

POOR

● Best DX Windows from JO23 — Amsterdam

Great-circle distance, short-path beam heading, the bands most likely open right now from JO23 to each DX region at SFI 137 / Kp 2, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.

Target	Distance	Beam	Bands to try	Status
South Asia	4,316 mi	90°	40m, 20m, 80m	Open now
North America	4,581 mi	304°	10m, 15m, 20m	Open now
Southern Africa	5,636 mi	161°	10m, 15m, 20m	Open now
East Asia / Japan	5,645 mi	37°	40m, 20m, 80m	Open now
South America	6,009 mi	240°	10m, 15m, 20m	Open now
Oceania	10,052 mi	61°	40m, 20m, 80m	Open now

● Band-by-Time Plan for JO23

A planning heuristic for the local day at JO23, built from sunrise 03:39 UTC, sunset 19:55 UTC, SFI 137, and Kp 2. Not a measurement — a starting point for where to listen as the day turns.

Dawn grayline

around 03:39 UTC

40m · 30m · 20m

Grayline enhancement — low bands reach long distances as the terminator passes.

Morning

after 03:39 UTC

20m · 15m · 10m

High bands rising with the sun; check 10m for DX.

Midday

local noon

10m · 15m · 20m

Peak high-band window — 10m and 15m open widest.

Dusk grayline

around 19:55 UTC

20m · 40m

Second grayline peak — 20m holds, then hands off to 40m.

Night

after 19:55 UTC

40m · 80m

Low bands own the darkness — 40m for DX, 80m regional.

Recent local activity

Spots touching JO23 and the adjacent squares

These are the newest 10m, 15m, and 20m reports where one side of the path sits in JO23, JO24, JO22, JO33, JO13. This gives the page unique, local context instead of a generic solar snapshot.

No fresh PSKReporter paths are cached for the immediate JO23 footprint right now. That usually means you should widen the search to the nearest regional hubs below or fall back to 20m/40m for the next operating window.

Top DX targets

Where this grid is reaching right now

No outbound targets were strong enough to rank from the current cache. Check back after the next PSKReporter refresh or switch to the regional grids below.

Contest preview

Next major contest outlook

No contest event is currently loaded. For planning from JO23, start with 10m EXCELLENT, 15m EXCELLENT, 20m GOOD and keep 20m available as the safest all-around fallback.

Open contest calendar

Nearby grids