The horn is a popular instrument in A Song of Ice and Fire for quick and easy communication.
A horn is often made from the horn of a horned animal, such as an aurochs or even a dragon.. Horns can come in various sizes. They can be banded with metals, such as bronze or gold. A dragon horn can have Valyrian glyphs written upon it. A warhorn's sound can be long and low and can carry far and wide.
Horns can be used to sound the alarum, to rouse camps, and to herald the coming of pit fighters. Sentries of the Night's Watch sound one blast when rangers return to the Wall, two blasts for wildlings, and three blasts for Others.
—Jon Snow's narrative
A sentry's horn greeted them as they approached, sounding from on high like the cry of some, huge, deep-throated bird, a single long blast the meant rangers returning. —Jon Snow’s narrative
AHooooooooooooooooooooooo, the warhorn cried, long and low, a sound to curdle blood. Asha began to hate the sound of horns. On Old Wyk her uncle’s hellhorn had blown a death knell for her dream, and now Hagen was sounding what might well be her last hour on earth.—Asha Greyjoy's narrative
—Jon Connington's narrative
- A Clash of Kings, Chapter 34, Jon IV.
- A Feast for Crows, Chapter 19, The Drowned Man.
- A Dance with Dragons, Chapter 63, Victarion I.
- A Dance with Dragons, Chapter 26, The Wayward Bride.
- A Dance with Dragons, Chapter 61, The Griffin Reborn.
- A Dance with Dragons, Chapter 62, The Sacrifice.
- A Dance with Dragons, Chapter 59, The Discarded Knight.
- A Storm of Swords, Prologue.
- A Storm of Swords, Chapter 11, Jaime II.
- The Citadel. Heraldry: Houses in the Reach
- A Clash of Kings, Chapter 11, Theon I.
- The Citadel. Heraldry: Houses in the Iron Islands
- A Storm of Swords, Appendix.
- A Feast for Crows, Appendix.
- A Feast for Crows, Chapter 27, Jaime III.
- A Game of Thrones, Appendix.
- A Clash of Kings, Chapter 14, Arya IV.
- Fire & Blood, The Dying of the Dragons - Rhaenyra Triumphant.
- A Game of Thrones, Chapter 63, Catelyn X.
- A Feast for Crows, Chapter 13, The Soiled Knight.
- A Dance with Dragons, Chapter 53, Jon XI.
- A Dance with Dragons, Chapter 35, Jon VII.