.sj为挪威属地司瓦尔巴特群岛及扬马延岛国家及地区顶级域（ccTLD）的域名，但未被使用。

A .ac .ad .ae .af .ag .ai .al .am .ao .aq .ar .as.asia .at .au .aw .ax .az    B .ba .bb .bd .be .bf .bg .bh .bi .bj .bm .bn .bo .br .bs .bt .bw .by .bz    C .ca .cc .cd .cf .cg .ch .ci .ck .cl .cm .cn .co .cr .cu .cv .cw .cx .cy .cz    D .de .dj .dk .dm .do .dz   E .ec .ee .eg .er .es .et .eu    F .fi .fj .fk .fm .fo .fr    G .ga .gd .ge .gf .gg .gh .gi .gl .gm .gn .gp .gq .gr .gs .gt .gu .gw .gy    H .hk .hm .hn .hr .ht .hu    I .id .ie .il .im .in .io .iq .ir .is .it    J .je .jm .jo .jp    K .ke .kg .kh .ki .km .kn .kp .kr .kw .ky .kz    L .la .lb .lc .li .lk .lr .ls .lt .lu .lv .ly    M .ma .mc .md .me .mg .mh .mk .ml .mm .mn .mo .mp .mq .mr .ms .mt .mu .mv .mw .mx .my .mz    N .na .nc .ne .nf .ng .ni .nl .no .np .nr .nu .nz    O .om    P .pa .pe .pf .pg .ph .pk .pl .pm .pn .pr .ps .pt .pw .py    Q .qa    R .re .ro .rs .ru .rw    S .sa .sb .sc .sd .se .sg .sh .si .sk .sl .sm .sn .so .sr .ss .st .su .sv .sx .sy .sz    T .tc .td .tf .tg .th .tj .tk .tl .tm .tn .to .tr .tt .tv .tw .tz    U .ua .ug .uk .us .uy .uz    V .va .vc .ve .vg .vi .vn .vu    W .wf .ws    Y .ye .yt    Z .za .zm .zw

.sj is the Internet country code top-level domain (ccTLD) reserved for the designation Svalbard and Jan Mayen. The domain name registry is Norid, but .sj is not open for registration. The issuing of the domain was based on the ISO 3166 designation of Svalbard and Jan Mayen, which consists of two separately administrated integrated territories of Norway: the Arctic archipelago Svalbard and the nearly uninhabited volcanic island Jan Mayen. .sj was designated on 21 August 1997, at the same time as Bouvet Island was allocated .bv. Both were placed under the .no registry Norid, which is also the sponsor. Norwegian policy states that .no is sufficient for those institutions connected to both Svalbard and Jan Mayen, and therefore the domain is not open to registration. It is Norwegian policy not to commercialize domain resources, so there are no plans to sell .sj. Should the domain later come into use, it will be under regulation of the Norwegian Post and Telecommunications Authority and follow the same policy as .no. There are two second-level domains reserved for the two areas: svalbard.no and jan-mayen.no, but other web addresses are also used.