What grid square is Ho Chi Minh City?

OK21 is the live DXRadar reference square for Ho Chi Minh City. The exact portable or home QTH may vary within the square, but this page tracks the center of OK21 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 OK21 right now?

OK21 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 OK21 Band Conditions — Ho Chi Minh City

Localized HF conditions for Maidenhead locator OK21. Coordinating at 11.50°, 105.00°. Updated with real-time telemetry from NOAA and DX cluster reports.

OK21 conditions are GOOD. Best bands: 10m, 12m, 15m, 17m, 20m. SFI: 137.

Regional Radar

SFI

137

K-Index

2 Kp

Center Coords

11.5, 105.0

Local Phase

Night

Grayline window

Sunrise 22:46 UTC

Sunset 11:28 UTC from OK21

From Ho Chi Minh City, work the 22:46 UTC and 11:28 UTC grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses OK21.

Best band now

10m

Night operation should keep 20m on watch and move to 40m as the path darkens.

Closest operating hub

Ho Chi Minh City

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

Latitude zone: tropical
Local phase: Darkness
Aurora exposure: low at this latitude
Grayline: 22:46 UTC / 11:28 UTC
Best high band: 10m
Nearest city: Ho Chi Minh City

● Local Band Quality Scorings

Use this local score for OK21, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.

10m

POOR

15m

POOR

20m

FAIR

40m

EXCELLENT

80m

EXCELLENT

● Best DX Windows from OK21 — Ho Chi Minh City

Great-circle distance, short-path beam heading, the bands most likely open right now from OK21 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	1,924 mi	296°	40m, 80m, 20m	Open now
East Asia / Japan	2,664 mi	45°	40m, 20m, 80m	Open now
Oceania	4,144 mi	135°	40m, 20m, 80m	Open now
Europe	5,831 mi	320°	40m, 20m, 80m	Open now
Southern Africa	5,899 mi	242°	40m, 20m, 80m	Open now
North America	8,646 mi	22°	10m, 15m, 20m	Open now
South America	11,269 mi	256°	40m, 20m, 80m	Open now

● Band-by-Time Plan for OK21

A planning heuristic for the local day at OK21, built from sunrise 22:46 UTC, sunset 11:28 UTC, SFI 137, and Kp 2. Not a measurement — a starting point for where to listen as the day turns.

Dawn grayline

around 22:46 UTC

40m · 30m · 20m

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

Morning

after 22:46 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 11:28 UTC

20m · 40m

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

Night

after 11:28 UTC

40m · 80m

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

Recent local activity

Spots touching OK21 and the adjacent squares

These are the newest 10m, 15m, and 20m reports where one side of the path sits in OK21, OK22, OK20, OK31, OK11. This gives the page unique, local context instead of a generic solar snapshot.

No fresh PSKReporter paths are cached for the immediate OK21 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 OK21, start with 10m POOR, 15m POOR, 20m FAIR and keep 20m available as the safest all-around fallback.

Open contest calendar

Nearby grids