Data as of Nov 3, 2026

63.128.0.0/16

No anonymizer space · no proxy exits in 30 days

CenturyLink Communications, LLC

Announcement

this exact prefix

No RPKI

Announced by

AS3561

Type

Internet provider

85% of it

Recent change

New origin May 2026

its first announcement on record

Announcements

Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.

More specific

Announcements inside

Arrived

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Prefix	Origin	Type	Holder
63.128.0.0/18 since Jan 2021	AS3561	Internet provider	CenturyLink Communications, LLC
63.128.0.0/22 since May 2023	AS203	Unknown	CenturyLink Communications, LLC via Blackbaud, Inc.
63.128.1.0/24 since Aug 2023	AS203	Unknown	CenturyLink Communications, LLC via Blackbaud, Inc.
63.128.7.0/24 since May 2023	AS203	Unknown	CenturyLink Communications, LLC via Blackbaud, Inc.
63.128.8.0/22 since May 2023	AS203	Unknown	CenturyLink Communications, LLC via Blackbaud, Inc.
63.128.12.0/24 since May 2023	AS203	Unknown	CenturyLink Communications, LLC via Blackbaud, Inc.
63.128.14.0/24 since May 2023	AS203	Internet provider	CenturyLink Communications, LLC
63.128.20.0/24 since May 2023	AS203	Unknown	CenturyLink Communications, LLC via Blackbaud, Inc.
63.128.21.0/24 since Jul 2017	AS30031	Business	CenturyLink Communications, LLC
63.128.24.0/24 since May 2023	AS203	Unknown	CenturyLink Communications, LLC via Blackbaud, Inc.
63.128.34.0/23 since Aug 2016	AS46263	Business	CenturyLink Communications, LLC
63.128.64.0/18 since Aug 2020	AS3561	Internet provider	CenturyLink Communications, LLC
63.128.85.0/24 since Nov 2019	AS3561	Internet provider	CenturyLink Communications, LLC
63.128.88.0/24 since Nov 2019	AS3561	Internet provider	CenturyLink Communications, LLC
63.128.102.0/23 since Apr 2026	AS26584	Business	CenturyLink Communications, LLC
63.128.102.0/24 since Oct 2025	AS26584	Business	CenturyLink Communications, LLC
63.128.103.0/24 since Oct 2025	AS26584	Business	CenturyLink Communications, LLC
63.128.128.0/18 since Nov 2018	AS3561	Internet provider	CenturyLink Communications, LLC
63.128.130.0/24 since Feb 2011	AS22013	Business	CenturyLink Communications, LLC via Guardian Analytics, Inc.
63.128.170.0/24 since Feb 2013	AS22013	Business	CenturyLink Communications, LLC via Guardian Analytics

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
63.128.0.0/15	131,072	CENTURYLINK-LEGACY-SAVVIS-BLK236	CenturyLink Communications, LLC (CCL-534) · US	Direct Allocation	Nov 30, 1999	[email protected]
└ 63.128.0.0/22	1,024	SAVV-S259964-14	Blackbaud, Inc. (BLACKB-4) · US	Reallocated	Oct 19, 2010	[email protected]
└ 63.128.4.0/24	256	SAVV-S233195-8	unknown	—	—	—
└ 63.128.5.0/24	256	SAVV-S601076-7	unknown	—	—	—
└ 63.128.6.0/28	16	SAVV-S233479-5	unknown	—	—	—
└ 63.128.6.32/28	16	SAVV-S233488-13	unknown	—	—	—
└ 63.128.6.48/28	16	SAVV-S233479-5	unknown	—	—	—
└ 63.128.6.64/26	64	SAVV-S233479-5	unknown	—	—	—
└ 63.128.6.136/29	8	SAVV-S606312-0	unknown	—	—	—
└ 63.128.6.144/29	8	SAVV-S604078-8	unknown	—	—	—
└ 63.128.6.152/29	8	SAVV-S604078-9	unknown	—	—	—
└ 63.128.6.160/27	32	SAVV-S604078	unknown	—	—	—
└ 63.128.6.192/27	32	SAVV-S259054-0	unknown	—	—	—
└ 63.128.6.224/27	32	SAVV-S604078-0	unknown	—	—	—
└ 63.128.7.0/24	256	SAVV-S259964-16	Blackbaud, Inc. (BLACK-146) · US	Reallocated	May 3, 2011	—
└ 63.128.8.0/22	1,024	SAVV-S259964-15	Blackbaud, Inc. (BLACK-145) · US	Reallocated	May 3, 2011	[email protected]
└ 63.128.12.0/24	256	SAVV-S259964-17	Blackbaud, Inc. (BLACK-147) · US	Reallocated	May 3, 2011	—
└ 63.128.13.96/27	32	SAVV-S612216-0	unknown	—	—	—
└ 63.128.13.128/26	64	SAVV-S615758-0	unknown	—	—	—
└ 63.128.13.192/26	64	SAVV-S604078-3	unknown	—	—	—
└ 63.128.16.0/30	4	SAVV-S612010-0	unknown	—	—	—
└ 63.128.16.4/30	4	SAVV-S612010-0	unknown	—	—	—
└ 63.128.16.48/29	8	SAVV-S606312-0	unknown	—	—	—
└ 63.128.16.56/29	8	SAVV-S612009-1	unknown	—	—	—
└ 63.128.16.64/29	8	SAVV-S612009-2	unknown	—	—	—
└ 63.128.16.72/29	8	SAVV-S618005-0	unknown	—	—	—
└ 63.128.17.0/24	256	SAVV-S601076-8	unknown	—	—	—
└ 63.128.18.0/24	256	SAVV-S612269-0	unknown	—	—	—
└ 63.128.19.0/27	32	SAVV-S259964-22	unknown	—	—	—
└ 63.128.19.32/27	32	SAVV-S616630-0	unknown	—	—	—
└ 63.128.19.64/26	64	SAVV-S606312-0	unknown	—	—	—
└ 63.128.19.128/26	64	SAVV-S618005-0	unknown	—	—	—
└ 63.128.19.192/27	32	SAVV-S618005-0	unknown	—	—	—
└ 63.128.19.224/27	32	SAVV-S233978-0	unknown	—	—	—
└ 63.128.20.0/24	256	SAVV-S259964-23	Blackbaud, Inc. (BLACK-154) · US	Reallocated	Apr 1, 2013	—
└ 63.128.22.0/24	256	SAVV-S601076-9	unknown	—	—	—
└ 63.128.24.0/22	1,024	SAVV-S259964-24	Blackbaud, Inc. (BLACK-159) · US	Reallocated	Aug 12, 2013	[email protected]
└ 63.128.32.64/26	64	SAVV-S252127-0	unknown	—	—	—
└ 63.128.32.128/28	16	SAVV-S252127-0	unknown	—	—	—
└ 63.128.32.192/26	64	SAVV-S252127-13	unknown	—	—	—
└ 63.128.33.0/24	256	SAVV-S618005-0	unknown	—	—	—
└ 63.128.34.0/23	512	SAVV-S265152-1	Zeta Interactive (ZI-80) · US	Reassigned	Jul 6, 2016	—
└ 63.128.67.24/29	8	SAVV-S612723-0	unknown	—	—	—
└ 63.128.67.104/29	8	SAVV-S608093-0	unknown	—	—	—
└ 63.128.67.112/29	8	SAVV-S608093-0	unknown	—	—	—
└ 63.128.67.120/29	8	SAVV-S610650-0	unknown	—	—	—
└ 63.128.68.16/28	16	SAVV-S608975-1	unknown	—	—	—
└ 63.128.68.64/28	16	SAVV-S610650-0	unknown	—	—	—
└ 63.128.68.80/29	8	SAVV-S610650-0	unknown	—	—	—
└ 63.128.68.88/29	8	SAVV-S604158-24	unknown	—	—	—
└ 63.128.68.96/27	32	SAVV-S608182-0	unknown	—	—	—
└ 63.128.68.128/28	16	SAVV-S612049-0	unknown	—	—	—
└ 63.128.68.144/28	16	SAVV-S612049-0	unknown	—	—	—
└ 63.128.68.160/29	8	SAVV-S612049-0	unknown	—	—	—
└ 63.128.68.168/29	8	SAVV-SV4820-0	unknown	—	—	—
└ 63.128.68.176/28	16	SAVV-S615718-0	unknown	—	—	—
└ 63.128.68.200/29	8	SAVV-S622016-0	unknown	—	—	—
└ 63.128.68.208/28	16	SAVV-S606306-0	unknown	—	—	—
└ 63.128.68.224/27	32	SAVV-S611906-0	unknown	—	—	—
└ 63.128.70.192/28	16	SAVV-S234108-0	unknown	—	—	—
└ 63.128.70.240/29	8	SAVV-S616947-0	unknown	—	—	—
└ 63.128.71.0/24	256	SAVV-S609806-0	unknown	—	—	—
└ 63.128.73.0/24	256	SAVV-S609806-11	unknown	—	—	—
└ 63.128.74.40/29	8	SAVV-ZZAT1-0	unknown	—	—	—
└ 63.128.74.128/26	64	SAVV-S615341-0	unknown	—	—	—
└ 63.128.74.192/27	32	SAVV-S617005-0	unknown	—	—	—
└ 63.128.74.224/27	32	SAVV-S606306-34	unknown	—	—	—
└ 63.128.76.0/24	256	SAVV-S604158-10	unknown	—	—	—
└ 63.128.77.8/29	8	SAVV-S265022-0	unknown	—	—	—
└ 63.128.77.16/29	8	SAVV-S265022-0	unknown	—	—	—
└ 63.128.77.24/29	8	SAVV-S612314-0	unknown	—	—	—
└ 63.128.77.32/27	32	SAVV-S615718-0	unknown	—	—	—
└ 63.128.77.64/27	32	SAVV-S615725-0	unknown	—	—	—
└ 63.128.77.96/27	32	SAVV-S615725-0	unknown	—	—	—
└ 63.128.77.128/28	16	SAVV-S615725-0	unknown	—	—	—
└ 63.128.77.144/29	8	SAVV-S617766-0	unknown	—	—	—
└ 63.128.77.152/29	8	SAVV-S619294-0	unknown	—	—	—
└ 63.128.77.192/27	32	63-128-77-192-27	unknown	—	—	—
└ 63.128.78.0/24	256	SAVV-S612314-0	unknown	—	—	—
└ 63.128.79.0/24	256	SAVV-S612159-3	unknown	—	—	—
└ 63.128.80.48/28	16	SAVV-S618057-0	unknown	—	—	—
└ 63.128.80.192/28	16	SAVV-S621658-0	unknown	—	—	—
└ 63.128.80.224/27	32	SAVV-S623498-0	unknown	—	—	—
└ 63.128.86.0/27	32	SAVV-S616947-0	unknown	—	—	—
└ 63.128.86.32/27	32	SAVV-S610650-0	unknown	—	—	—
└ 63.128.86.128/27	32	SAVV-S606306-0	unknown	—	—	—
└ 63.128.86.160/29	8	SAVV-S618881-0	unknown	—	—	—
└ 63.128.86.168/29	8	SAVV-S618881-0	unknown	—	—	—
└ 63.128.86.176/28	16	SAVV-S616038-0	unknown	—	—	—
└ 63.128.86.192/27	32	SAVV-S623652-0	unknown	—	—	—
└ 63.128.86.248/29	8	SAVV-S620257-0	unknown	—	—	—
└ 63.128.89.0/24	256	SAVV-S618408-0	unknown	—	—	—
└ 63.128.90.0/24	256	SAVV-S618408-0	unknown	—	—	—
└ 63.128.91.0/24	256	SAVV-S619097-0	unknown	—	—	—
└ 63.128.92.0/24	256	SAVV-S619315-0	unknown	—	—	—
└ 63.128.93.0/24	256	SAVV-S619294-0	unknown	—	—	—
└ 63.128.95.0/28	16	SAVV-S620257-0	unknown	—	—	—
└ 63.128.95.16/29	8	SAVV-S620950-0	unknown	—	—	—
└ 63.128.95.32/27	32	SAVV-S620980-0	unknown	—	—	—
└ 63.128.95.64/28	16	SAVV-S621429-0	unknown	—	—	—
└ 63.128.95.96/29	8	SAVV-S621429-0	unknown	—	—	—
└ 63.128.95.104/29	8	SAVV-S621429-0	unknown	—	—	—
└ 63.128.95.120/29	8	SAVV-S626415-0	unknown	—	—	—
└ 63.128.95.128/26	64	SAVV-S621023-0	unknown	—	—	—
└ 63.128.95.192/27	32	SAVV-S608203-0	unknown	—	—	—
└ 63.128.95.224/29	8	SAVV-S618408-0	unknown	—	—	—
└ 63.128.95.232/29	8	SAVV-S623282-0	unknown	—	—	—
└ 63.128.95.240/29	8	SAVV-S623652-0	unknown	—	—	—
└ 63.128.95.248/29	8	SAVV-S618408-7	unknown	—	—	—
└ 63.128.96.0/24	256	SAVV-S621429-0	unknown	—	—	—
└ 63.128.97.80/29	8	SAVV-S612049-0	unknown	—	—	—
└ 63.128.97.88/29	8	SAVV-S622899-0	unknown	—	—	—
└ 63.128.97.96/28	16	SAVV-S618057-3	unknown	—	—	—
└ 63.128.97.120/29	8	SAVV-S623421-0	unknown	—	—	—
└ 63.128.97.128/26	64	SAVV-S622451-0	unknown	—	—	—
└ 63.128.97.192/27	32	SAVV-S622899-0	unknown	—	—	—
└ 63.128.98.64/27	32	SAVV-S623421-0	unknown	—	—	—
└ 63.128.98.96/28	16	Q0205-63-128-98-96	unknown	—	—	—
└ 63.128.98.128/25	128	SAVV-S623695-0	unknown	—	—	—
└ 63.128.99.128/27	32	SAVV-S623652-0	unknown	—	—	—
└ 63.128.99.184/29	8	SAVV-S624441-0	unknown	—	—	—
└ 63.128.99.192/28	16	SAVV-S624441-0	unknown	—	—	—
└ 63.128.99.240/29	8	SAVV-S624441-0	unknown	—	—	—
└ 63.128.100.0/24	256	SAVV-S623695-0	unknown	—	—	—
└ 63.128.101.0/24	256	SAVV-S609858-3	unknown	—	—	—
└ 63.128.104.96/28	16	SAVV-S624767-0	unknown	—	—	—
└ 63.128.104.112/29	8	SAVV-S624767-0	unknown	—	—	—
└ 63.128.104.120/29	8	SAVV-S617332-0	unknown	—	—	—
└ 63.128.104.136/29	8	SAVV-S624886-0	unknown	—	—	—
└ 63.128.104.152/29	8	SAVV-S625095-0	unknown	—	—	—
└ 63.128.104.160/27	32	SAVV-S624886-0	unknown	—	—	—
└ 63.128.104.192/27	32	SAVV-S625058-0	unknown	—	—	—
└ 63.128.104.232/29	8	SAVV-S606306-0	unknown	—	—	—
└ 63.128.105.0/25	128	SAVV-S621023-5	unknown	—	—	—
└ 63.128.105.128/28	16	SAVV-S626778-0	unknown	—	—	—
└ 63.128.105.176/29	8	SAVV-S639628-0	unknown	—	—	—
└ 63.128.105.192/26	64	SAVV-S627558-0	unknown	—	—	—
└ 63.128.107.32/28	16	SAVV-S631635-0	unknown	—	—	—
└ 63.128.107.48/28	16	SAVV-S632136-0	unknown	—	—	—
└ 63.128.107.64/27	32	SAVV-S606306-53	unknown	—	—	—
└ 63.128.107.96/29	8	SAVV-S624441-41	unknown	—	—	—
└ 63.128.107.104/29	8	SAVV-S624441-42	unknown	—	—	—
└ 63.128.107.128/27	32	SAVV-S633005-0	unknown	—	—	—
└ 63.128.107.192/27	32	SAVV-S608093-0	unknown	—	—	—
└ 63.128.107.224/27	32	SAVV-S608093-0	unknown	—	—	—
└ 63.128.108.0/27	32	SAVV-S608093-0	unknown	—	—	—
└ 63.128.108.32/27	32	SAVV-S633005-0	unknown	—	—	—
└ 63.128.108.192/27	32	SAVV-S615017-0	unknown	—	—	—
└ 63.128.108.224/29	8	SAVV-S637530-0	unknown	—	—	—
└ 63.128.108.232/29	8	SAVV-S618057-3	unknown	—	—	—
└ 63.128.108.240/29	8	SAVV-S616038-0	unknown	—	—	—
└ 63.128.109.0/25	128	SAVV-S608093-0	unknown	—	—	—
└ 63.128.110.0/24	256	SAVV-S637530-0	unknown	—	—	—
└ 63.128.129.16/29	8	SAVV-S612292-0	unknown	—	—	—
└ 63.128.129.96/29	8	SAVV-S612292-0	unknown	—	—	—
└ 63.128.129.120/29	8	SAVV-S606855-18	unknown	—	—	—
└ 63.128.129.160/27	32	SAVV-S606602-0	unknown	—	—	—
└ 63.128.129.192/27	32	SAVV-S606602-0	unknown	—	—	—
└ 63.128.129.224/27	32	SAVV-S606602-0	unknown	—	—	—
└ 63.128.130.0/24	256	SAVV-S606309-4	Guardian Analytics, Inc. (GUARD-49) · US	Reallocated	Feb 2, 2011	—
└ 63.128.134.64/26	64	SAVV-S605327-0	unknown	—	—	—
└ 63.128.134.128/29	8	SAVV-S605327-0	unknown	—	—	—
└ 63.128.134.136/29	8	SAVV-S605327-0	unknown	—	—	—
└ 63.128.134.144/29	8	SAVV-S606855-0	unknown	—	—	—
└ 63.128.134.152/29	8	SAVV-S606855-0	unknown	—	—	—
└ 63.128.134.160/27	32	SAVV-S602716-0	unknown	—	—	—
└ 63.128.134.216/29	8	SAVV-S610411-0	unknown	—	—	—
└ 63.128.134.224/29	8	SAVV-S617010-0	unknown	—	—	—
└ 63.128.134.240/29	8	SAVV-S621009-0	unknown	—	—	—
└ 63.128.135.0/26	64	SAVV-S615294-0	unknown	—	—	—
└ 63.128.135.64/26	64	SAVV-S617042-4	unknown	—	—	—
└ 63.128.135.128/26	64	SAVV-S260170-2	unknown	—	—	—
└ 63.128.138.0/26	64	SAVV-S600052-16	unknown	—	—	—
└ 63.128.138.96/28	16	SAVV-S618370-0	unknown	—	—	—
└ 63.128.138.128/26	64	SAVV-S601986-4	unknown	—	—	—
└ 63.128.138.192/27	32	SAVV-S605817-0	unknown	—	—	—
└ 63.128.138.224/27	32	SAVV-S605817-0	unknown	—	—	—
└ 63.128.139.72/29	8	SAVV-S605682-0	unknown	—	—	—
└ 63.128.139.96/28	16	SAVV-S605682-0	unknown	—	—	—
└ 63.128.139.136/29	8	SAVV-S626230-0	unknown	—	—	—
└ 63.128.139.168/29	8	SAVV-S234193-10	unknown	—	—	—
└ 63.128.141.64/29	8	SAVV-S609339-0	unknown	—	—	—
└ 63.128.141.128/28	16	SAVV-S601842-0	unknown	—	—	—
└ 63.128.141.160/29	8	SAVV-S616277-0	unknown	—	—	—
└ 63.128.142.0/24	256	SAVV-S232991-39	unknown	—	—	—
└ 63.128.144.0/26	64	SAVV-S617189-0	unknown	—	—	—
└ 63.128.146.0/29	8	SAVV-S601842-0	unknown	—	—	—
└ 63.128.146.32/27	32	SAVV-S609128-0	unknown	—	—	—
└ 63.128.147.136/29	8	SAVV-ZZSC9-3	unknown	—	—	—
└ 63.128.147.192/27	32	SAVV-S616885-0	unknown	—	—	—
└ 63.128.147.224/27	32	SAVV-S616885-0	unknown	—	—	—
└ 63.128.148.128/29	8	SAVV-S606855-0	unknown	—	—	—
└ 63.128.148.192/29	8	SAVV-S600901-0	unknown	—	—	—
└ 63.128.149.224/27	32	SAVV-S612266-0	unknown	—	—	—
└ 63.128.150.0/29	8	SAVV-S606855-0	unknown	—	—	—
└ 63.128.151.0/24	256	SAVV-S608609-0	unknown	—	—	—
└ 63.128.153.240/28	16	SAVV-S618002-0	unknown	—	—	—
└ 63.128.154.64/29	8	SAVV-S608589-0	unknown	—	—	—
└ 63.128.154.80/29	8	SAVV-S616178-0	unknown	—	—	—
└ 63.128.154.88/29	8	SAVV-S618002-0	unknown	—	—	—
└ 63.128.155.0/24	256	SAVV-S608589-0	unknown	—	—	—

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Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

65,536 addresses

Type	Addresses	Share	Ranges
Internet provider	56,016	85%	102
Business	5,936	9.1%	201
Unknown	3,072	4.7%	8
Hosting	512	0.78%	1

Network & registry

Announcement Routing history Whois & abuse

Origin network

AS3561

Name: CenturyLink Communications, LLC
Type: Internet provider
Registered: Oct 7, 1998
Domain: lumen.com
Website: www.lumen.com/
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed

63.128.0.0/16

Announcements

More-specifics by size

Announcements inside

Registrations in this block

Composition

Address share

Types across the prefix

Network & registry

AS3561

Who has announced this prefix

Routing history

Registration for this announcement

Abuse contact