Vacation rentals in Halpine Village

I’m not finding reliable information that Halpine Village is an independent city in Maryland. It may be a neighborhood or unincorporated area within a larger city. Could you confirm the city it’s part of (for example, Rockville, Bethesda, Potomac, etc.) so I can craft an accurate 2–3 sentence blurb? If you’d like a quick fallback now, I can provide a generic 2–3 sentence blurb about Halpine Village’s location in the Washington, D.C. metropolitan area, which you can tailor once the exact city is confirmed.