https://b2bkontakty.pl/en/blog/ Guides to company data, public registers and B2B outreach. en Tue, 13 Oct 2026 12:00:00 GMT https://b2bkontakty.pl/en/blog/b2b-telemarketing-email-poland-art-398.htmlhttps://b2bkontakty.pl/en/blog/b2b-telemarketing-email-poland-art-398.htmlTue, 13 Oct 2026 12:00:00 GMTFrom November 2024, sales calls and emails in Poland require prior consent – companies not exempt. What Article 398 PKE says, sanctions, what remains allowed. https://b2bkontakty.pl/en/blog/free-polish-company-data-ceidg-krs-regon.htmlhttps://b2bkontakty.pl/en/blog/free-polish-company-data-ceidg-krs-regon.htmlTue, 13 Oct 2026 12:00:00 GMTA free Polish company database exists at the authorities. What is available from CEIDG, KRS and REGON, through which API, on what terms, and what is missing. https://b2bkontakty.pl/en/blog/how-to-buy-a-company-database.htmlhttps://b2bkontakty.pl/en/blog/how-to-buy-a-company-database.htmlTue, 13 Oct 2026 12:00:00 GMTBefore you buy a company database: ten questions about sources, data date, regional coverage, empty fields, consent and licence. A checklist for buyers. https://b2bkontakty.pl/en/blog/pkd-2025-industry-codes.htmlhttps://b2bkontakty.pl/en/blog/pkd-2025-industry-codes.htmlTue, 13 Oct 2026 12:00:00 GMTPKD 2025 has applied since 1 January 2025, PKD 2007 until the end of 2026. Which sections changed letters, which codes changed meaning and how to filter companies. https://b2bkontakty.pl/en/blog/czech-public-registers.htmlhttps://b2bkontakty.pl/en/blog/czech-public-registers.htmlSun, 30 Aug 2026 12:00:00 GMTWhat Czech public registers — ARES, the ISIR insolvency register, the unreliable VAT payer list and the contract register — reveal. https://b2bkontakty.pl/en/blog/find-b2b-contacts-czechia.htmlhttps://b2bkontakty.pl/en/blog/find-b2b-contacts-czechia.htmlSun, 30 Aug 2026 12:00:00 GMTHow to find B2B contacts for Czech companies: where the data comes from, how to filter by industry and region, and how to verify it. https://b2bkontakty.pl/en/blog/gdpr-b2b-outreach-czechia.htmlhttps://b2bkontakty.pl/en/blog/gdpr-b2b-outreach-czechia.htmlSun, 30 Aug 2026 12:00:00 GMTGDPR legitimate interest, Czech Act 480/2004 and Polish law: what applies when you contact Czech companies by phone, post or email. https://b2bkontakty.pl/en/blog/targeted-company-list.htmlhttps://b2bkontakty.pl/en/blog/targeted-company-list.htmlSun, 30 Aug 2026 12:00:00 GMTHow to build a targeted B2B company list by NACE industry code, region, company size and VAT status. A step-by-step guide for sales teams. https://b2bkontakty.pl/en/blog/verify-czech-vat-payers.htmlhttps://b2bkontakty.pl/en/blog/verify-czech-vat-payers.htmlSun, 30 Aug 2026 12:00:00 GMTWhat "nespolehlivý plátce DPH" means under Czech law, why it creates joint VAT liability, and how to check your entire supplier list at scale.