About Long Island MLS
Ask a Long Island agent over 40 where listings live and the reflex answer is still MLSLI. Long Island MLS (MLSLI), the Multiple Listing Service of Long Island, was the wholly owned MLS of the Long Island Board of REALTORS and, for years, the largest MLS in New York state. Its listings now flow through OneKey MLS, so a search for Long Island MLS IDX ends with a OneKey feed carrying the same Nassau, Suffolk, and Queens inventory.
The MLSLI legacy:
- Operated as the MLS subsidiary of the Long Island Board of REALTORS (LIBOR), one of the largest local REALTOR boards in the country
- Computerized listing roots on Long Island reach back to 1974, generations before web search
- Connected thousands of cooperating brokerage offices across Nassau, Suffolk, and Queens
- Merged with the Hudson Gateway MLS to form OneKey, announced in 2018
- MLSLI.com, once the island's house-hunting homepage, was replaced by OneKeyMLS.com in June 2020
The brand retired at the height of its relevance, which is exactly why the name still pulls searches, shows up in old listing agreements, and lives on office signage from Valley Stream to Riverhead.
Coverage area
Long Island MLS territory, now served through OneKey, covers:
- New York - Long Island and Queens, with successor reach into the Hudson Valley
The historical MLSLI footprint:
- Nassau County: Levittown, Massapequa, Great Neck, Rockville Centre, and the South Shore commuter towns
- Suffolk County: Babylon, Brookhaven, Riverhead, the North Fork wine country, and the East End
- Queens: Bayside, Forest Hills, Flushing, and Jamaica, where LIBOR membership always ran deep
- Through OneKey today: Brooklyn and Bronx listing data, plus Westchester and the Hudson Valley counties
Manhattan's market lives mostly on REBNY's separate system. For the island itself, from the Queens line to Montauk Point, this is the listing lineage that matters.
How to get Long Island MLS listings on your website
MLSLI's own paperwork is history; the working process belongs to OneKey, and CloseDaily runs the vendor half of it:
- Carry a OneKey subscription. MLSLI members rolled into OneKey during the merger, and LIBOR membership remains the local doorway.
- Sign OneKey's data license electronically. You and your broker each e-sign when the license arrives by email.
- CloseDaily works its MLS Grid account. OneKey feeds route through MLS Grid, where we already operate, and we prep your site for OneKey's pre-approval website review.
- The island goes searchable on your domain. Nassau to the North Fork, with listing pages and instant alerts, built and switched on by CloseDaily.
If your files still hold MLSLI-era IDX paperwork, treat it as memorabilia. The current license chain is OneKey's, and we handle it fresh.
CloseDaily and Long Island MLS
CloseDaily supports IDX integration for Long Island MLS, fulfilled today through OneKey. Your site searches the full island inventory while the built-in CRM banks every lead and keeps the follow-up conversation alive.
Long Island buyers shop taxes, train lines, and school districts with spreadsheet intensity. A site that saves their searches and pings them when a Massapequa colonial lists is how you become the agent they call first.
Plans price from $299 per month, and a credit card is needed for the 7-day free trial. Onboarding completes the feed work in a few business days once OneKey's approval lands.
Start your 7-day free trial or Book a demo and put this coverage to work on your own site.
Frequently asked questions
Does CloseDaily support Long Island MLS IDX?
Yes. CloseDaily supports IDX integration for Long Island MLS through OneKey, its successor system. The feed carries the Nassau, Suffolk, and Queens markets MLSLI was built on.
How do I add Long Island MLS home search to my website?
Follow the OneKey path: e-sign the data license with your broker, and CloseDaily manages the MLS Grid request and the website review prep. Your site launches during onboarding.
What areas does Long Island MLS cover?
The MLSLI heartland is Nassau, Suffolk, and Queens, and its successor OneKey extends that with New York City listing data and the Hudson Valley counties. One feed now covers what once took two memberships.
How long does Long Island MLS IDX setup take?
OneKey reviews both the signed license and the website itself, so the site needs to be review-ready, which is part of our onboarding. Expect a few business days on each side of that approval.
Is MLSLI still a thing?
The name is retired but the operation never stopped: MLSLI merged into OneKey, and the listings, members, and history carried over. Our OneKey MLS page covers the current organization.
What happened to MLSLI.com?
It was replaced by OneKeyMLS.com in June 2020 as the consumer search site. Old bookmarks redirect to the successor, which is usually how agents discover the merger happened.
Related MLS coverage
- OneKey MLS - New York
- Hudson Gateway MLS - New York
- Brooklyn MLS - New York
- NY State MLS - New York
- Real Estate Board of New York - New York
Long Island MLS is a trademark of its respective owner. CloseDaily is an independent IDX and CRM provider. CloseDaily is not affiliated with, endorsed by, or sponsored by Long Island MLS or its parent organization.