Via Net Works (VNWI) 10-K 2004 FY Annual report

Exhibit 21.1

SUBSIDIARIES OF VIA NET.WORKS, INC.

CORPORATE STRUCTURE AS OF DECEMBER 31, 2004

The following table indicates the name, subsidiary relationships and jurisdiction of formation of VIA NET.WORKS, Inc. direct and indirect subsidiaries.

					Jurisdiction of
Name					Formation
1. VIA NET.WORKS NY Corp					New York
2. VIA NET.WORKS Holdco, Inc.					Delaware
	A.	AMEN S.A.S.			France
	B.	AMEN Ltd.			UK
	C.	AMEN S.L. (100%)			Spain
	D.	PSINET			Netherlands
		1.	PSINET Unix Support		Netherlands
	E.	PSINET Belgium BVBA/SPRL			Belgium
	F.	PSINET Germany GmbH			Germany
	G.	PSINET Datacenter Germany GmbH			Germany
3. VIA NET.WORKS Europe Holding B.V.					Netherlands
	A.	AMEN NEDERLAND B.V			Netherlands
	B.	VIA NET.WORKS Nederland B.V.			Netherlands
	C.	bART Holding B.V.			Netherlands
		1.	Home Vision B.V.		Netherlands
		2.	Xenovic B.V.		Netherlands
			(a)	bART Noord Nederland	Netherlands
			(b)	bART Midden Nederland	Netherlands
			(c)	Arameta B.V.	Netherlands
	D.	VIA NET.WORKS Portugal			Portugal
		1.	AMEN Portugal		Portugal
		2.	Expobyte Conferencias e Esposicoes S.A.		Portugal
		3.	Surftrade Portugal		Portugal
	E.	VIA NET.WORKS Espana, S.L.			Spain
	F.	VIA NET.WORKS IRUCo. Ltd			Ireland
	G.	VIA NET.WORKS Deutschland GmbH			Germany
	I .	VIA NET.WORKS Holdco Italy S.R.L.			Italy
	J.	VIA NET.WORKS France Holding S.A.S.			France
		1.	PSINET France Sarl		France
		2.	VIA NET.WORKS France S.A.		France
	K.	VIA NET.WORKS (Schweiz) AG			Switzerland
		1.	PSINET Switzerland Sarl		Switzerland
	L.	VIA NET.WORKS Express B.V.			Netherlands
	M.	VIA NET.WORKS UK Holding Ltd.			UK
		1.	VIA NET.WORKS Jersey Ltd		Jersey
		2.	VIA NET.WORKS Italia Holdco		Italy
	N.	VIA NET.WORKS Deutsche Holding GmbH			Germany
4. VIA NET.WORKS USA, Inc.					Georgia
5. Surftrade U.S.A., Inc					Delaware
	A	SurfTrade Ltda (Brasil)			Brasil