Document and Entity Information - USD ($)		12 Months Ended
Apr. 01, 2019	Dec. 31, 2018	Jun. 30, 2018
Details
Registrant Name		FULLNET COMMUNICATIONS INC
Registrant CIK		0001092570
SEC Form		10-K
Period End date		Dec. 31, 2018
Fiscal Year End		--12-31
Trading Symbol		fulo
Tax Identification Number (TIN)		731473361
Number of common stock shares outstanding	13,621,009
Public Float			$ 230,109
Filer Category		Non-accelerated Filer
Current with reporting		Yes
Voluntary filer		No
Well-known Seasoned Issuer		No
Shell Company		false
Small Business		true
Emerging Growth Company		false
Amendment Flag		false
Document Fiscal Year Focus		2018
Document Fiscal Period Focus		FY
Entity Incorporation, State Country Name		OKLAHOMA
Entity Address, Address Line One		201 Robert S. Kerr Avenue, Suite 210
Entity Address, City or Town		Oklahoma City
Entity Address, State or Province		Oklahoma
Entity Address, Postal Zip Code		73102
City Area Code		405
Local Phone Number		236-8200
Entity Listing, Par Value Per Share	$ 0.00001

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State aggregate market value of voting and non-voting common equity held by non-affiliates computed by reference to price at which the common equity was last sold, or average bid and asked price of such common equity, as of the last business day of registrant's most recently completed second fiscal quarter. The public float should be reported on the cover page of the registrants form 10K.

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