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Securities and Exchange Commission
Washington, D.C. 20549
FORM 24F-2
Annual Notice of Securities Sold
Pursuant to Rule 24f-2
1. Name and address of issuer:
Prudential Securities Incorporated
One Seaport Plaza
New York, NY 10292
2. Name of each series or class of funds for which this
notice is filed:
National Municipal Trust Series 186
3. Investment Company Act File Number:
811-2345
Securities Act File Number:
33-54697
4(a). Last day of fiscal year for which this notice is filed:
December 31, 1997
4(b). Check box if this notice is being filed late (i.e., more
than 90 days after the end of the issuer's fiscal year).
[ ]
Note: if the Form is being filed more than 90 days after
the end of the issuer's fiscal year, interest must be paid
on the registration fee due.
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4(c). Check box if this is the last time the issuer will be filing
this Form.
[ ]
5. Calculation of registration fee:
(i). Aggregate sale price of secur-
ities sold during the fiscal year
pursuant to section 24(f): $126,674.71
(ii). Aggregate price of securities
redeemed or repurchased
during the fiscal year: $ 0
(iii). Aggregate price of securities
redeemed or repurchased during
any prior fiscal year ending no
earlier than October 11, 1995
that were not previously used to
reduce registration fees payable
to the Commission: $ 0
(iv). Total available redemption credits
[add Items 5(ii) and 5(iii)]: $ 0
(v). Net sales -- if Item 5(i) is
greater than Item 5(iv)
[subtract Item 5(iv) from Item 5(i)]: $126,674.71
(vi). Redemption credits available for
use in future years if Item 5(i) is
less than Item 5(iv) [subtract Item
5(iv) from Item 5(i)]: $ 0
(vii). Multiplier for determining registration
fee (See Instuction C.8): x .000295
(viii). Registration fee due [multiply Item
5(v) by Item 5(vii)] (enter "0" if
no fee is due): $37.37
6. N/A
7. Interest due -- if this Form is being
filed more than 90 days after the end
of the issuer's fiscal year
(see instruction D): +$ 0
8. Total of the amount of the registration
fee due plus any interest due [line 5(viii)
plus line 7]: $37.37
9. Date of registration fee and any interest payment
was sent to the Commission's lockbox
depository: March 20, 1998
Method of Delivery:
[ X ] Wire Transfer
[ ] Mail or other means
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SIGNATURES
This report has been signed below by the following person on
behalf of the issuer and in the capacity and on the date
indicated.
By: Richard R. Hoffmann
Richard R. Hoffmann
First Vice President
Date: March 20, 1998
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