A method for providing a number URL service which is executed by a server, comprising steps of: receiving, from at least one user terminal, a User Interface selection signal to select at least one UI; characterized by: outputting a frame in response to the received UI selection signal, the frame having NxM blanks with a first row, a first column, an M-th row, an N-th column, and a center frame having (N-2)x(M-2) blanks; when a first digit selection signal to select any one of blanks of the first row of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received first digit selection signal; when a second digit selection signal to select any one of blanks of the first column of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received second digit selection signal; when a third digit selection signal to select any one of blanks of the N-th column of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received third digit selection signal; when a fourth digit selection signal to select any one of blanks of the M-th row of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received fourth digit selection signal; and when a fifth digit selection signal to select any one of blanks of the center frame which has been finally changed is received from the at least one user terminal, outputting a site mapped to a number URL address having 5 digits corresponding to the first digit selection signal to the fifth digit selection signal, wherein the center frame comprising the (N-2)x(M-2) blanks indicates a series of numbers in each blank, and attribute information of the at least one blank is changed whenever the first selection signal to the fourth selection signal are received, wherein a blank is greyed-out if a mapped site is present. receiving, from at least one user terminal, a User Interface selection signal to select at least one UI; characterized by: outputting a frame in response to the received UI selection signal, the frame having NxM blanks with a first row, a first column, an M-th row, an N-th column, and a center frame having (N-2)x(M-2) blanks; when a first digit selection signal to select any one of blanks of the first row of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received first digit selection signal; when a second digit selection signal to select any one of blanks of the first column of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received second digit selection signal; when a third digit selection signal to select any one of blanks of the N-th column of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received third digit selection signal; when a fourth digit selection signal to select any one of blanks of the M-th row of the frame is received from the at least one user terminal, changing the (N-2)x(M-2) blanks of the center frame of the frame in response to the received fourth digit selection signal; and when a fifth digit selection signal to select any one of blanks of the center frame which has been finally changed is received from the at least one user terminal, outputting a site mapped to a number URL address having 5 digits corresponding to the first digit selection signal to the fifth digit selection signal, wherein the center frame comprising the (N-2)x(M-2) blanks indicates a series of numbers in each blank, and attribute information of the at least one blank is changed whenever the first selection signal to the fourth selection signal are received, wherein a blank is greyed-out if a mapped site is present.